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Show HN: DJ in the browser

61 points by musicnrd 10y ago

swaraj 10y ago
This is incredible!!
keypusher 10y ago
Doesn't seem to work in Firefox.
- Ace17 10y ago
  Same for me, can't get it to work :-(
  - musicnrd 10y ago
    Oh bugger, what version of Firefox and OS are you using? I admit I only built it with Chrome but I did test it last night on Firefox osx and it was working ok.
    - keypusher 10y ago
      Latest Firefox on OSX. Song from A plays but no sound ever comes from B despite adjusting faders. I tried it in Chrome and it works great there.
packetslave 10y ago
very, very cool but calling something music-related "Reacktor" is a really good way to get a nastygram from Native Instruments.
- musicnrd 10y ago
  Good point, you can obviously see where my inspiration came from ;) I'll look at naming it and moving it to it's own host soon.
antfarm 10y ago
why is the crossfader disabled?
- musicnrd 10y ago
  Sorry, haven't had a chance to build it yet
  - vincentriemer 10y ago
    https://gist.github.com/scneptune/7498000 https://gist.github.com/scneptune/7498000
a1ps 10y ago
Really cool, but we need the crossfader. :)
- eyeJam 10y ago
  Use the volume sliders! I've been mixing without the fader for years now. You get way more control that way.
- musicnrd 10y ago
  It's coming soon, I just need to fix the logic for controlling the volume faders and the crossfader together.
- musicnrd 10y ago
  It's done and active now, enjoy :)
acconrad 10y ago
As a DJ, a few requests on an amazing start: - sort by Key - sort by BPM - move the song dragging it (need to line up by the kick) - cue points
- musicnrd 10y ago
  I'm looking into bpm detection and cue points are on each player (they just might be hidden on a small screen). Will look into key and dragging the waveform. Thanks for the feedback.
  - aethos 10y ago
    Do you have any leads on bpm detection? I tried doing it in Python a while ago for a project and the library I used was always 5-10bpm off...
    - deleted 10y ago
      [deleted]
    - coroxout 10y ago
      Total shot in the dark but I don't suppose it was reading a 44.1kHz file at 48kHz or the other way round?
    - letier 10y ago
      There was a nice article on the beatport tech blog. I didn't manage to find it when I searched yesterday. Basically what they suggested was applying a low pass filter to isolate the base drums, then count the most common intervals between peaks (basically some kind of transformation) and then reconstruct the BPM from there by applying a range from 80-160 or similar. Hope this gives you a rough idea. I implemented and tested it and it worked quite well with electronic music.
      - coroxout 10y ago
        Thanks! Was it this one? http://web.archive.org/web/20160304012151/http://tech.beatport.com/2014/web-audio/beat-detection-using-web-audio/ http://web.archive.org/web/20160304012151/http://tech.beatpo... (no longer on the beatport site; tech.beatport doesn't seem to exist any more and the current beatport blog starts at 2015)
zaptheimpaler 10y ago
Is the playlist somewhere on soundcloud? I really liked it.
ruler88 10y ago
amazing work, I loved playing with it. I'm a DJ nub tho :( would be really cool to have a very quick tooltip getting started mixing the first song kind of thing
- musicnrd 10y ago
  Cheers, good point. I want to try and stay away from sync capabilities but it would be a great idea to show how to beat match using the app. Thanks.
  - eyeJam 10y ago
    this is pretty great man! i've been playing with it for a couple hours now. my only complaint is that it's pretty hard to time the drop since there seems to be some lag between when i click and when the track starts playing (could just be my computer though).
letier 10y ago
Very cool! I hacked the exact same thing a while ago. Also with soundcloud integration (and some filters and stuff). I'll take a peek at the code when i get to my computer in the next days. Maybe there is something where i could contribute.
- musicnrd 10y ago
  Awesome, keep me posted.
  - letier 10y ago
    Just checked, your repo seems to be private. (or I'm a bit blind :)) Here is the link to what I hacked back then: https://github.com/letier/boombox https://github.com/letier/boombox I'm planning on doing a complete rewrite, when I finally find the time. This thing was build pretty quickly.
    - musicnrd 10y ago
      Wow, that's really cool. Yeah, sorry the repo is private until I get it cleaned up a bit. This has been built quite quickly as well ;)
peternicky 10y ago
Link for source code?
stockkid 10y ago
I had fun with this. I found it kind of hard to mix without auto sync. Sorting by key/BPM will be a good feature.
imakesoft 10y ago
This is very cool! I wish I would know how to be a DJ. :)

61 points by musicnrd 10y ago

swaraj 10y ago

This is incredible!!

keypusher 10y ago

Doesn't seem to work in Firefox.

Ace17 10y ago
Same for me, can't get it to work :-(
- musicnrd 10y ago
  Oh bugger, what version of Firefox and OS are you using? I admit I only built it with Chrome but I did test it last night on Firefox osx and it was working ok.
  - keypusher 10y ago
    Latest Firefox on OSX. Song from A plays but no sound ever comes from B despite adjusting faders. I tried it in Chrome and it works great there.

packetslave 10y ago

very, very cool but calling something music-related "Reacktor" is a really good way to get a nastygram from Native Instruments.

musicnrd 10y ago
Good point, you can obviously see where my inspiration came from ;) I'll look at naming it and moving it to it's own host soon.

antfarm 10y ago

why is the crossfader disabled?

musicnrd 10y ago
Sorry, haven't had a chance to build it yet
- vincentriemer 10y ago
  https://gist.github.com/scneptune/7498000 https://gist.github.com/scneptune/7498000

a1ps 10y ago

Really cool, but we need the crossfader. :)

eyeJam 10y ago
Use the volume sliders! I've been mixing without the fader for years now. You get way more control that way.
musicnrd 10y ago
It's coming soon, I just need to fix the logic for controlling the volume faders and the crossfader together.
musicnrd 10y ago
It's done and active now, enjoy :)

acconrad 10y ago

As a DJ, a few requests on an amazing start: - sort by Key - sort by BPM - move the song dragging it (need to line up by the kick) - cue points

musicnrd 10y ago
I'm looking into bpm detection and cue points are on each player (they just might be hidden on a small screen). Will look into key and dragging the waveform. Thanks for the feedback.
- aethos 10y ago
  Do you have any leads on bpm detection? I tried doing it in Python a while ago for a project and the library I used was always 5-10bpm off...
  - deleted 10y ago
    [deleted]
  - coroxout 10y ago
    Total shot in the dark but I don't suppose it was reading a 44.1kHz file at 48kHz or the other way round?
  - letier 10y ago
    There was a nice article on the beatport tech blog. I didn't manage to find it when I searched yesterday. Basically what they suggested was applying a low pass filter to isolate the base drums, then count the most common intervals between peaks (basically some kind of transformation) and then reconstruct the BPM from there by applying a range from 80-160 or similar. Hope this gives you a rough idea. I implemented and tested it and it worked quite well with electronic music.
    - coroxout 10y ago
      Thanks! Was it this one? http://web.archive.org/web/20160304012151/http://tech.beatport.com/2014/web-audio/beat-detection-using-web-audio/ http://web.archive.org/web/20160304012151/http://tech.beatpo... (no longer on the beatport site; tech.beatport doesn't seem to exist any more and the current beatport blog starts at 2015)

zaptheimpaler 10y ago

Is the playlist somewhere on soundcloud? I really liked it.

ruler88 10y ago

amazing work, I loved playing with it. I'm a DJ nub tho :( would be really cool to have a very quick tooltip getting started mixing the first song kind of thing

musicnrd 10y ago
Cheers, good point. I want to try and stay away from sync capabilities but it would be a great idea to show how to beat match using the app. Thanks.
- eyeJam 10y ago
  this is pretty great man! i've been playing with it for a couple hours now. my only complaint is that it's pretty hard to time the drop since there seems to be some lag between when i click and when the track starts playing (could just be my computer though).

letier 10y ago

Very cool! I hacked the exact same thing a while ago. Also with soundcloud integration (and some filters and stuff). I'll take a peek at the code when i get to my computer in the next days. Maybe there is something where i could contribute.

musicnrd 10y ago
Awesome, keep me posted.
- letier 10y ago
  Just checked, your repo seems to be private. (or I'm a bit blind :)) Here is the link to what I hacked back then: https://github.com/letier/boombox https://github.com/letier/boombox I'm planning on doing a complete rewrite, when I finally find the time. This thing was build pretty quickly.
  - musicnrd 10y ago
    Wow, that's really cool. Yeah, sorry the repo is private until I get it cleaned up a bit. This has been built quite quickly as well ;)

peternicky 10y ago

Link for source code?

stockkid 10y ago

I had fun with this. I found it kind of hard to mix without auto sync. Sorting by key/BPM will be a good feature.

imakesoft 10y ago

This is very cool! I wish I would know how to be a DJ. :)