WEBVTT
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Hello, my name is Grant Shangreaux.
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This is my talk titled Bard Bivou(m)acs:
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Publishing Music
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with Emacs. I'm a software
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developer with Unabridged Software in
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Lincoln, Nebraska.
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Long time Emacs user, relatively new
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Emacs hacker.
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Hopefully, I'll be able to show
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you my workflow, with
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how I publish music with Emacs.
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All right. So as a musician, I would like
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to publish my music online.
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I could publish with popular
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online music services,
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but I'm more of a DIY-type, so I chose to
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go ahead and publish with Emacs.
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What's the motivation behind this?
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A lot of it comes down to some
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fundamental freedoms
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that Emacs and GNU software
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represent to me, as well as my
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ideas on culture and my background.
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I don't believe that music is a consumer good.
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It's a form of knowledge,
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like an algorithm.
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And it's just such a part of
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culture, like in tribal cultures, music
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was seen as a gift from the cosmos or
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the gods. It was
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a gift maybe through an individual
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vessel, but was shared with the people
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and shared with everyone,
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kept alive by the culture itself.
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So to me, music is something that
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should be shared and should be
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freely enjoyed by everyone. Of course,
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artists should be compensated as well,
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but that's a whole different topic.
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So when I want to share my music,
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I want to do it without impacting
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anyone's freedom.
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Using GNU software like Emacs is a
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good way that I can ensure that
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I won't be requiring people to
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sign away their freedoms for anything.
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There's a lot more I could say about
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this but I don't have time.
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Feel free to reach out to me by email or IRC.
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Part of the motivation for me,
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personally, is that Emacs is super
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magical. It's an all-in-one solution.
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Like I said, the GNU software aligns with
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Creative Commons' ideas.
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I can do file management. I can author
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HTML, all the web stuff I need even,
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literate-style.
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I can handle media and metadata. I've got
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version control, remote server access...
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All the tools I need are right under my
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fingertips with this tool
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that I use every day for a long time.
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I don't need to look elsewhere.
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It was a challenge.
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I wanted to see if I could do this
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all within Emacs itself.
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So, how do you use Emacs to publish music?
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Well, for me, I needed
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a couple of things. I needed to be able
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to audition and label
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unlabeled audio tracks. I have a lot of
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files that I don't know where they
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came from. I don't know what they are. I
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need to be able to listen to them,
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and I need to be able to add metadata to
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whatever audio format it is
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and rename the files based on that
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metadata, potentially.
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And in the end, I wanted to take those
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files and programmatically produce a web page
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for people to consume. I found out that
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Emacs scores a hundred percent on all of
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these requirements that I had for this, and
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a lot of that came from EMMS, the Emacs
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multimedia system.
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EMMS is great.
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If you haven't checked it out, please do.
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It's a little bit unintuitive, but
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once you get into it, you know it works.
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Basically, what EMMS gave me was the
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ability to listen to the tracks,
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organize playlists.
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On top of that, it gave me
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super-powered metadata authoring.
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I'm going to demonstrate that to you.
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So in order to do this,
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you have to require markable playlists,
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so (require 'emms-mark). I'm going to
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go through, and I'm going to open the red...
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I've got this. These files here. So
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you can see these files are mp3s.
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They're recorded on a
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digital recorder.
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If I had the choice, I would have a
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recorder that used a different format,
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but so be it. I can mark all these files
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and I can do EMMS
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add to .., and now they've been loaded
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into a playlist.
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So you can see the playlist here. There's
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some leftover files.
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So I've got these three files in my
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playlist, and as you can see, it's just
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the file name,
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the path. I don't have any metadata
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associated with them.
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In this playlist, I can hit E,
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and it'll bring up a buffer showing
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the tag information that I have.
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I could edit these here.
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I could edit them one at a time, but that's
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not really great. I want superpower
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metadata authoring. So,
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by marking them, I can then hit E, and I
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have all three of the tracks loaded up in
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this tags buffer.
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On top of that, I can do EMMS
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tag editor, set all, C-c C-r,
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and I want to set the artist.
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so these are some recordings of my
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family.
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So, Shangreaux, set all three of them.
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I want to set the album:
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Spring Walk with Lap Harp.
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I want to set the year.
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And then I'm going to go ahead and put
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these in manually,
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but with the power of Emacs keyboard
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macros and
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registers and so on. I could do this
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programmatically as well,
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which would make it a lot easier if I
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had much more than three files to
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do this with.
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Submit the changes with C-c C-c,
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and now we've got the playlist. You can
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see the artist and track number have
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been updated here.
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And then the final piece of this is that
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if you look at this, you can see that the
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file name is still the same.
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So if I were looking at the directory,
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I would still have this file name.
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When packaging these up for a release,
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for people to download,
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it's nice to be able to have that
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filename reflect the track number and the
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artist and so on. So there's another
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command, EMMS
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rename tag editor, rename, so it could be
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just capital R.
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I think I need to mark all of these, hit
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capital R, and then it's going to ask me
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to confirm
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and say yes to all of them.
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And now, if you look in the--
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whoops I have to update it--you'll see
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it's been updated with the artist,
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track number and
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track name.
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This format is a format string, so
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it's customizable of course.
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I just decided to go with the default.
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So that's pretty great, this workflow
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just with EMMS. I didn't have to do
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anything. This is all there. It's all
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built in. It gave me exactly what
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I was looking for in terms of being able
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to process a lot of raw audio files
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add metadata to them and get them ready
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for publishing.
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And this is for publishing for playback
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in any media player. It'll be
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useful. Not just for the web page that I'm
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building. So the
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final part, of course, is to build the
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web page. Emacs makes authoring HTML trivial.
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As I was going through this, I
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wanted to challenge myself and just be,
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like, can I do this
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just all with Emacs? Can I just make this?
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I don't need a... I don't need Ruby. I don't
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need Rails. I don't need Node. I don't
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need any of this other stuff. I have my
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tool right here. It's a fully...
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It's a whole operating system, basically,
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plus programming languages.
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So the first thing I started with was
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buffer scripting for manipulating text.
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That's kind of the easiest way to do it.
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Basically, anything you can do in a
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buffer, you can do
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programmatically with Elisp. So this
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might be a good example for beginners. If
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you haven't done any Elisp yet,
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a simple example is to create this
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this div
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output here. You
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can use this with-temp-buffer, so
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basically creating an imaginary buffer.
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insert is just like typing, so you put
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strings in, you put new lines in,
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you can build some strings together.
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Here you can see
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I'm doing a random number, so every time
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I execute this,
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my content changes. I can generate
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dynamic content in HTML blocks
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with Elisp. For my
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web page builder, It's a little more
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complex. I'm pulling data out
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using EMMS data structures,
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so it's pulling that out from the track data.
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And then I'm using some program to
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generate list elements, so each track is
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going to have the title
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and track number, and then a button for
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playing it, plus the source
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of the audio file, which will get added
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here.
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Right now, this is hard coded for Opus, so
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it won't work for my MP3s.
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I'm going to skip over snippets. Turns
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out format strings were good enough
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for me. Snippets could be useful, but
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format is super powerful, and I didn't
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really even need all that much power,
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basically, just doing string
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interpolation. So if you haven't seen
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format before,
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you basically put these control strings
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or control characters inside of a string,
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and you can generate an
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output string that you want.
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So in my generator code, basically, it's
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down here,
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I'm calling format with this Bard
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Bivou(m)acs template,
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and that's basically a big
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a big string of HTML. It's just
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my whole page of HTML
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with those control characters in just
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four places.
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One of them populates the track list.
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That's really the meat of the program.
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Again, this is a combination of using
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buffer scripting,
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using HTML mode, inserting text format strings,
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and then I can indent-region so the HTML
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actually looks pretty
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when it comes out of it as well.
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I will show that, just really quick
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actually.
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So you can see, this is the HTML that got
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generated. I've got my template.
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I inserted the title here, the style, the
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font was all inserted,
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and then this whole list of of tracks here.
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It's kind of messy to look at,
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but this track list, this whole div here,
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is all generated by
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my generator code, and it works. It's great.
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Okay, moving on.
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So the other thing was that as I was
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developing this, I decided to use
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Org Babel and some of his
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its features for multi-language
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things because I needed to style it with
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CSS and
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and put actions in Javascript, and also I
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used SVG for authoring stuff.
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It was a little bit complicated.
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It probably would have been simpler had I
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not used Org Babel, but it's also really
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fun. I think it's a cool,
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cool idea to use literate programming. My
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idea was to create HTML
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components. I could name it like this,
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put a format string inside it, and build
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a function
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in Elisp to format it and spit out the
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HTML that I want.
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By doing this, then, I can
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just change things in my Org file which,
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not getting a whole lot of time to work
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on it, I can come back to it and
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I have a lot of notes. I can
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kind of generate things as I'm going and
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keep notes for myself, and keep the...
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I don't know. It's cool. Literate
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programming is fun. So I don't need to
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go into that too much, but you can see if
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I execute this here,
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I get the the div that I want. It's a
00:12:33.360 --> 00:12:34.880
little bit funny. You'll see I have the
00:12:34.880 --> 00:12:36.480
string like this, the way that
00:12:36.480 --> 00:12:39.200
noweb expands, I can't do this on a
00:12:39.200 --> 00:12:40.000
single line.
00:12:40.000 --> 00:12:43.839
It looks funny when you do that,
00:12:43.839 --> 00:12:45.440
so that might be something to work out
00:12:45.440 --> 00:12:48.959
later. CSS blocks can either be tangled out
00:12:48.959 --> 00:12:52.639
and referenced in the HTML source or inlined.
00:12:52.639 --> 00:12:54.639
Here's an example I have of inlining it.
00:12:54.639 --> 00:12:56.959
So I've got my little CSS block named
00:12:56.959 --> 00:13:00.320
style, Javascript named script,
00:13:00.320 --> 00:13:03.040
and then I've got this HTML source block
00:13:03.040 --> 00:13:04.839
with noweb expansion.
00:13:04.839 --> 00:13:07.920
These double angle brackets here
00:13:07.920 --> 00:13:09.839
are where I'm going to expand the block
00:13:09.839 --> 00:13:12.639
named style. I'm actually calling a function,
00:13:12.639 --> 00:13:14.399
so I want the result of the function
00:13:14.399 --> 00:13:17.040
here, and then the script will just get
00:13:17.040 --> 00:13:22.959
expanded here. So org-babel-expand-src-block,
00:13:22.959 --> 00:13:25.360
you can see what it looks like.
00:13:25.360 --> 00:13:28.160
I've got my style here. I've got my title.
00:13:28.160 --> 00:13:29.920
I've got that main content class
00:13:29.920 --> 00:13:31.279
I showed before,
00:13:31.279 --> 00:13:34.480
and the script as well. So that's kind of cool.
00:13:34.480 --> 00:13:36.320
I could just run org-babel-tangle and
00:13:36.320 --> 00:13:38.160
get my thing out and just
00:13:38.160 --> 00:13:40.480
edit one file instead of multiple files.
00:13:40.480 --> 00:13:41.600
Not for everyone,
00:13:41.600 --> 00:13:45.839
but I thought it was kind of fun.
00:13:45.839 --> 00:13:47.760
All right. Oh, and the final thing is that
00:13:47.760 --> 00:13:49.199
in Emacs, you can
00:13:49.199 --> 00:13:52.880
author and view SVG. So this is just an
00:13:52.880 --> 00:13:57.199
Org. This SVG, I used to make the play
00:13:57.199 --> 00:13:59.519
and pause buttons. I didn't know this,
00:13:59.519 --> 00:14:02.800
but if you edit an SVG file, you can
00:14:02.800 --> 00:14:08.800
toggle back and forth
00:14:08.800 --> 00:14:13.199
between the code and the image.
00:14:13.199 --> 00:14:17.360
It's pretty sweet. So I can iteratively
00:14:17.360 --> 00:14:19.680
work through this because of how
00:14:19.680 --> 00:14:20.560
Emacs is.
00:14:20.560 --> 00:14:24.959
Final considerations here,
00:14:24.959 --> 00:14:27.360
like when doing this, I want it to be all
00:14:27.360 --> 00:14:29.279
free, so I want to use fonts that use a
00:14:29.279 --> 00:14:30.079
free license.
00:14:30.079 --> 00:14:32.800
I found GNU Unifont. It's kind of cool.
00:14:32.800 --> 00:14:34.800
The content license... I chose
00:14:34.800 --> 00:14:37.600
Creative Commons Attribution ShareAlike,
00:14:37.600 --> 00:14:39.920
which is kind of like the GPL.
00:14:39.920 --> 00:14:42.880
Ideally, I could serve it with Emacs. I'd
00:14:42.880 --> 00:14:44.800
like to remove idiosyncrasy so other
00:14:44.800 --> 00:14:46.320
people can use it.
00:14:46.320 --> 00:14:48.720
It's pretty much just my tool right now.
00:14:48.720 --> 00:14:51.040
Not requiring the web browser... I can
00:14:51.040 --> 00:14:54.079
ship playlists so that you can just
00:14:54.079 --> 00:14:58.000
click or link to a playlist on your favorite
00:14:58.000 --> 00:15:00.639
player, even EMMS if you want, and then
00:15:00.639 --> 00:15:02.639
packing up those albums in like a ZIP or
00:15:02.639 --> 00:15:04.320
.tar file.
00:15:04.320 --> 00:15:08.639
So you can go to churls.world .
00:15:08.639 --> 00:15:10.880
It just has a link to this album. I'll
00:15:10.880 --> 00:15:14.000
display it here in just a second.
00:15:14.000 --> 00:15:17.519
You can contact me. I'm shoshin on #emacs
00:15:17.519 --> 00:15:21.040
in IRC and on sourcehut. You can email me
00:15:21.040 --> 00:15:23.680
grant@churls.world, personal, or
00:15:23.680 --> 00:15:26.800
grant@unabridgedsoftware.com. All right, now.
00:15:26.800 --> 00:15:32.079
Let's see about this...
00:15:32.079 --> 00:15:33.680
This is up online, so if you want to
00:15:33.680 --> 00:15:35.120
listen to my
00:15:35.120 --> 00:15:39.199
college band's album from 20 years ago,
00:15:39.199 --> 00:15:43.040
here it is: Cassiopeia Basement Days.
00:15:43.040 --> 00:15:47.680
Whoops. I made this art in Krita. You can
00:15:47.680 --> 00:15:51.199
press play. You can skip around.
00:15:51.199 --> 00:15:55.040
I do have the playlist up here too.
00:15:55.040 --> 00:15:58.560
So yeah, thanks for listening.
00:15:58.560 --> 00:16:00.880
I hope you enjoyed it, and enjoy the rest
00:16:00.880 --> 00:16:07.360
of EmacsConf. Goodbye!
