Newbie question re SL7 Pro Unmix - guitars wanted

[SledDriver]

I’m completly new to spectral ediiting, so be gentle.

When I unmix a song to stems in SL7 Pro I get Vocals, Piano, Drums, Bass, Other.

Is there some techincal reason guitars don’t get unmixed separately? They seem to be bundled into ‘Other’ with strings etc.

Is there a way to do this as easily as the other stems?

Or a more involved technique I need to learn?

[Dr.Strangelove]

There is only a limited number of options for unmix, as you have found out.

You ask if there is a technical reason…well the unmix function is heavily based on Spleeter (let’s be honest…it IS Spleeter) and they haven’t done the work to (yet?) to unmix guitars

maybe for a future version.

[Nspace]

@dr

You ask if there is a technical reason…well the unmix function is heavily based on Spleeter (let’s be honest…it IS Spleeter) and they haven’t done the work to (yet?) to unmix guitars

Well Mr dr, Robin had in a past post precised your ‘honest’ appreciation newly expressed here. I quote next the answer then put forward, so those reading this thread, also have accurate info:

@Robin Lobel

Hi dr, let me clarify.
I happen to know the Deezer team personally (we’re both based in Paris), and while most of SL’s unmixing is based on their initial training, the implementation in SL goes beyond the public Spleeter package (it actually use zero lines from this code, removes several of its technical limitations such as sample rate, channels, frequency range, length, bit depth…, and provides more optimized results), and it was initially implemented in SL7 before january. We’ve reviewed together how the training could be improved (or not), and it came apparent that guitar was difficult to discriminate for the reasons I mentioned in the other post, as well as the flute.
As for the other unmixing and restoration processes, they were trained entirely in-house.

//As its easy to appreciate, by the explanation and its actual use; Spectralayers 7 unmix function is not Spleeter. To be based on is very different to your emphasis stated above. *1

This is ‘the other post’ with further info about the Unmix feature that Robin mentioned in that quotation:

@Robin Lobel

These unmixing process are driven by deep learning AI models, which requires thousands of examples for each instrument and days of computing to train proper separation model. Experiments were made to train it on flute and guitar, but unfortunately it does not work as well as flute is pretty close to vocals in term of spectral signature, and guitar spectral signature is so wide that it’s hard to properly capture it and discriminate it from say piano for instance. That being said, it may evolve in the future.

From this interesting thread:

Create new stems for Unmix Stems

*1(Edited out further qualifiers here, for the congeniality of this forum).

[Dr.Strangelove]

@Nspace

@dr

the unmix function is heavily based on Spleeter (let’s be honest…it IS Spleeter) and they haven’t done the work to (yet?) to unmix guitars

Well Mr dr, Robin had in a past post precised your ‘honest’ appreciation newly expressed here. So I quote next the answer then put forward, so those reading this thread, also have accurate info:

@Robin Lobel

MOST of SL’s unmixing is based on their (Spleeter’s) initial training…and it came apparent that guitar was difficult to discriminate

Spectralayers 7 unmix function is not Spleeter.

Nspace you are 100% correct - it’s nothing to do with Spleeter - zero, zilch, nada, no way, totally different. How can it be - SL7 runs at different sample rates, different bit depths ?

I’m glad you’ve cleared that up for me.

[Nspace]

The irony expressed in your previous comment mr dr, might need at some point the further qualifiers restrained above.
I guess most forum readers will just add their own conclusions about how things have been expressed and reasoned in these threads, to the plethora of other similar lively examples going on in the media these times…

If I am correct in that, then I better send those ideas to you as a pm. However I am very busy at the moment and have a loong list of interesting and meaningful things to do in front of me (including dozens of Spectralayers 7 projects), so most probably will not, for the time being.

On the contrary, if I am wrong. Well, you knew better all the time.

[Dr.Strangelove]

@Nspace

However I am very busy at the moment and have a loong list of interesting and meaningful things to do in front of me

not to busy to be surfing this forum and posting here of course

[SledDriver]

flute is pretty close to vocals in term of spectral signature, and guitar spectral signature is so wide that it’s hard to properly capture it and discriminate it from say piano for instance.

Thanks everyone.

Kind of as I expected.

Still amazing software! Enjoying learning this tool.