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#605070 - 07/04/20 01:05 AM [Recording, Mixing, Performance and Production] Spleeter - Free software that isolates bass/drum/piano/vocals/other parts
Registered: 09/27/10
Posts: 3654
Loc: Sacramento, California
dcuny Offline
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Registered: 09/27/10
Posts: 3654
Loc: Sacramento, California
Spleeter (if you click the link, scroll down past list of files for details) is an free, open source program that's capable of extracting up to five different types of tracks from a song:

  • bass
  • drums
  • piano
  • vocal
  • other

This isn't an version of the "invert the tracks to isolate the center" or "EQ to isolate the part" trick. It's able to isolate parts because it's a trained neural network. And it doesn't require a fancy GPU to work.

Sure, the output is smeared with artifacts and sounds like a low-quality MP3.

But if you'd love to get your hands on the stems of your favorite tracks to understand what makes them tick, this is probably as close as you're going to get. And for that purpose, it's amazing. (And it's why I've posted it here, and not in the "Off Topic" section).

The downside is that installing Spleeter requires the ability to enter instructions at the command prompt. You can find the instructions here.

It's important to read the instructions! For example, you need to make sure you've installed Python 3.6.2, not just any old version of Python. I found this video more helpful than the official instructions.

If you're not sure it's worth the effort to install, there are a couple of websites like ezstems where you can try it out for free.
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Vocal control, you say. Never heard of it. Is that some kind of ProTools thing?

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#605083 - 07/04/20 04:13 AM [Recording, Mixing, Performance and Production] Re: Spleeter - Free software that isolates bass/drum/piano/vocals/other parts [Re: dcuny]
Registered: 02/05/15
Posts: 5535
Pipeline Offline
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Thanks ! pretty darn good.
I have tried other things but nowhere as good as that.
Might try and integrate it into Reaper, using
reaper.ExecProcess( cmdline, timeoutmsec )
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#605400 - 07/06/20 02:07 PM [Recording, Mixing, Performance and Production] Re: Spleeter - Free software that isolates bass/drum/piano/vocals/other parts [Re: dcuny]
Registered: 02/05/15
Posts: 5535
Pipeline Offline
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#605476 - 07/07/20 05:52 AM [Recording, Mixing, Performance and Production] Re: Spleeter - Free software that isolates bass/drum/piano/vocals/other parts [Re: dcuny]
Registered: 02/15/17
Posts: 3357
Deryk - PG Music Offline
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Registered: 02/15/17
Posts: 3357
Thanks for the heads up - I've used software like this but never really gotten the results I was looking for. Maybe I'll give this a shot given the positive feedback on it.
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#605519 - 07/07/20 01:25 PM [Recording, Mixing, Performance and Production] Re: Spleeter - Free software that isolates bass/drum/piano/vocals/other parts [Re: Pipeline]
Registered: 09/27/10
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Loc: Sacramento, California
dcuny Offline
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Loc: Sacramento, California
Originally Posted By: Pipeline

I'm a lot less clever - I put together this simple .bat file:

spleeter separate -i %1 -p spleeter:5stems -o splits

It calls spleeter with the instruction to split the file into 5 stems. The output files are placed into is a folder with same name as the file, in a subfolder called stems.

I can just drag-and-drop the audio file onto the batch file. It's able to process a bunch of different file formats - .wav, .mp3, .wma and even .flac.
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Vocal control, you say. Never heard of it. Is that some kind of ProTools thing?

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#605552 - 07/07/20 07:25 PM [Recording, Mixing, Performance and Production] Re: Spleeter - Free software that isolates bass/drum/piano/vocals/other parts [Re: dcuny]
Registered: 02/05/15
Posts: 5535
Pipeline Offline
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Registered: 02/05/15
Posts: 5535
It's all your fault as you put me on to Lua smile

It's just using the Lua os.execute function, then inserts the media

Code:
os.execute([[cmd.exe /C " C:\ProgramData\Anaconda3\Scripts\activate.bat & echo processing please wait... & cd ]] .. script_path2 ..[[ & spleeter separate -i "]] .. filename .. [[" -p spleeter:5stems -o "]] .. filepath .. [[spleeter_output"]]) 

reaper.InsertMedia( filepath .. "spleeter_output//" .. folder_name .. "//bass.wav", 1 )
reaper.InsertMedia( filepath .. "spleeter_output//" .. folder_name .. "//drums.wav", 1 )
reaper.InsertMedia( filepath .. "spleeter_output//" .. folder_name .. "//other.wav", 1 )
reaper.InsertMedia( filepath .. "spleeter_output//" .. folder_name .. "//piano.wav", 1 )
reaper.InsertMedia( filepath .. "spleeter_output//" .. folder_name .. "//vocals.wav", 1 )                             
  
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#610370 - 08/12/20 04:36 AM [Recording, Mixing, Performance and Production] Re: Spleeter - Free software that isolates bass/drum/piano/vocals/other parts [Re: dcuny]
Registered: 04/04/18
Posts: 100
goofeyfoot Offline
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Registered: 04/04/18
Posts: 100
OK, I’m not sure if I understand all this but here’s what I’m picking up.

This application generates an accurate, but imperfect version of the riffs you’re looking for, right?

If that’s what happens, then how do you go to the next step, I E to bring that riff in a quality state into your project? You’re not going to want all the artifacts to make their way into your project.

Again I apologize if I’m misinterpreting what’s being said.

Michael
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#610397 - 08/12/20 09:15 AM [Recording, Mixing, Performance and Production] Re: Spleeter - Free software that isolates bass/drum/piano/vocals/other parts [Re: dcuny]
Registered: 07/12/00
Posts: 20658
Loc: Hudson Valley & Lake George NY
Matt Finley Online   content
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Registered: 07/12/00
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Michael, if I'm reading the information correctly, you would not use Spleeter in the way you describe. The quality is not yet adequate. I found this sentence about the purpose of the utility that speaks to how the developers think it will be used:

Purpose: We release Spleeter with pre-trained state-of-the-art models in order to help the Music Information Retrieval (MIR) community leverage the power of source separation in various MIR tasks, such as
vocal lyrics analysis from audio (audio/lyrics alignment, lyrics transcription...), music transcription (chord transcription, drums transcription, bass transcription, chord estimation, beat tracking), singer identification,
any type of multi-label classification (mood/genre...) or vocal melody extraction.
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#610416 - 08/12/20 11:45 AM [Recording, Mixing, Performance and Production] Re: Spleeter - Free software that isolates bass/drum/piano/vocals/other parts [Re: goofeyfoot]
Registered: 02/05/15
Posts: 5535
Pipeline Offline
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Registered: 02/05/15
Posts: 5535
If you use 2 stems setting in ezstems you will get 2 tracks one vocals and one instruments, so you get the karaoke and the acapella.
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#610882 - 08/15/20 09:26 PM [Recording, Mixing, Performance and Production] Re: Spleeter - Free software that isolates bass/drum/piano/vocals/other parts [Re: dcuny]
Registered: 10/14/08
Posts: 49
Loc: Toronto
Fivehands Offline
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Registered: 10/14/08
Posts: 49
Loc: Toronto
I think this is basically the same algorithm in use by Spectralayers from Steinberg. But I think they've taken it a few steps further. I got version 6 and 7 free with the purchase of Samplitude a few months ago, and in version 7 of Spectralayers they've added this bit of AI, but you can then take the 5 stems even further and add layers to each stem, they are tonal, noise and transient. So you can adjust these to taste, taking unwanted noise out of the equation and adjusting transient levels. This is a godsend for remixing a live track, say, in an overly reverberating hall. Then you can bring these 5 stems into your DAW of course and mix them to your desire.
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