How best to slow down / time-stretch audio?

StudioES

@Samu said:

@ocelot said:

@Samu said:
BM3, Cubasis, AuriaPro, ZenBeats and likely a few others (BeatHawk, Launchpad and Blocs Wave?) use Z-Plane's Elastique.

Which version of Elastique?

Version 3 last time I checked.
Cubasis lets you select between 3 CPU-Usage options, BM3 has two options. The formant options are missing in BM3 while they arr present in Cubasis. I guess ZenBeats uses the basic one since there’s hardly any options.

The amount of options depends highly on wich licensing model they opted to pay for.

Yes, it's interesting that Elastique Efficient has X number of options, depending on the software.

Curious about the 'licensing model'- maybe Z-Plane customizes or strips-down each algorithm/version based on what the licensee can afford. Or they license the algo made for 'beats'.

The new MPCs recently got Elastique Pro offline rendering, but with 0 options. It sounds different from my limited testing vs desktop DAWs.

It would be nice for iOS audio apps to have many ts algos, each suitable for different source material, like desktop DAWs.

BITCRUSHER

Hokusai audio editor can slow it down with or without changing the pitch...it has alot of functionality and is sooo easy to use.

seonnthaproducer

@espiegel123 said:

@seonnthaproducer said:

@SealTeamSick said:
DJay Pro is better timestretch than AudioStretch and it’s not even close.

I’d say it comparable to pitch n time, so I don’t think anything else on iOS is even close. Useful for finding key (most of the time) as well. I just throw a song on dJay, change the bpm then record the whole song on there and chop it on blocs. It’s quick enough.

Yup, this used to be my main sampling workflow. Was one of the reasons I made the iOS Shortcut, "Send Audio to App"

https://routinehub.co/shortcut/5189/

could you post a comparison of the same audio timestretched in DJay Pro and say BlocsWave or BeatMaker 3?

Not a bad idea. Thanks for the tip, @espiegel123 . Keep an eye out for it. I'll try and get it out by tomorrow.

Gavinski

@BitterGums said:

@Gavinski said:
Does auditor allow the kind of live scrubbing that I was doing in that example I posted with audiostretch? That is essential in what I am looking for

No it doesn't. wish it did..that example was really cool. Auditor has normal audio scrubbing, in the timeline ..like a DAW, but not within the time stretching function. And not nearly the level of granularity heard in the post. not even close. That almost reminded me of actual granular apps. Do you have Quanta?

I do but haven't really used it. Can it do this kind of scrubbing?

BitterGums

@Gavinski

kind of? it's definitely a granular focused app but you can import an audio file and the keys manipulate the 'playback head(s) ' in different ways based on length, attack, decay, pitch, playback direction etc. i know you like ambient stuff and it definitely goes there.

was also thinking that Samplr can sort of do what AudioStretch does but ..differently.
but it sounds like u want something for an fx slot ultimately.

Gavinski

I wonder if soundfruuze might be part of what I'm looking for. Have only vague memories of it and haven't used it in ages, but remember it being interesting

Will

tl;dr, so, sorry if this has already been mentioned but Loopy has a great time stretch algorithm built in.

Obo

@rs2000 said:
My experience is that it's worth to try different ones if you want good quality. Different material requires different algorithms.

This is very good to know. I never would have guessed that might be case. Thanks

Obo

@Gavinski said:
I wonder if soundfruuze might be part of what I'm looking for. Have only vague memories of it and haven't used it in ages, but remember it being interesting

Excellent app, I think most everyone will find something they like with that one. It can do quite a bit and it’s a lot of fun to use (in short “just get it!”)

Obo

@BITCRUSHER said:
Hokusai audio editor can slow it down with or without changing the pitch...it has alot of functionality and is sooo easy to use.

This is my favorite audio editor on iOS. Doesn’t get enough love. It’s amazing!

Obo

@seonnthaproducer said:

@SealTeamSick said:
DJay Pro is better timestretch than AudioStretch and it’s not even close.

I’d say it comparable to pitch n time, so I don’t think anything else on iOS is even close. Useful for finding key (most of the time) as well. I just throw a song on dJay, change the bpm then record the whole song on there and chop it on blocs. It’s quick enough.

Yup, this used to be my main sampling workflow. Was one of the reasons I made the iOS Shortcut, "Send Audio to App"

https://routinehub.co/shortcut/5189/

I still use your shortcuts all the time man, especially the video to audio. Every time I use it, I’m amazed at the world we live in where a “consumer” (meaning you) can set something like that up to begin with between various apps, sources. But also the element of you sharing it, me getting it and I end up using this tool from a guy I never met almost daily. It’s very strange when you stop to think about this stuff for a moment.

And I promise I’m not over here munching on magic mushrooms or anything like that, it’s just an amazing world we live in!

Obo

Man, this Djay app is pretty impressive! I can only find a way to get down to 37.5 bpm but it does an amazing job slowing down to 37.5 bpm from a song starting out at 125 bpm. Interesting...

Obo

@Gavinski i tried to kind of quickly recreate what you were doing on audiostretch in soundfruuze. It’s been a while since I’ve used this so not very familiar with controls and features (also appears updated quite a bit since last I recall). Anyway, this can maybe give you a taste of features but let me know if there’s something specific you want to see and I’ll try whatever. Using it feels kind of like that one feature in SAMPLR (the reel or whatever it is...).

Heads up, this is audiobus running SF as IAA. I couldn’t find a way to import audio in Soundfruuze standalone mode, so I loaded Audioshare into audiobus, looped audio file I had saved in audioshare already, then added soundfruuze in the effect slot. Sounds confusing but it’s not (in retrospect, would have used something other than audioshare for the source material as that’s just not a common use, might be confusing!).

I also tried in AUM first as AUV3 effect but couldn’t figure out how to stop the audio playing normal speed in the background (Soundfruuze wanted to play the audio file regular speed at same time as the speed changes so you couldn’t really hear it). Feel pretty confident there’s a way to turn this off but wasn’t finding it and thought this might work just as well.

Click link below to watch (I don’t know how to embed video here)

https://youtu.be/3aAMObw6WqI

seonnthaproducer

@Obo said:

@seonnthaproducer said:

@SealTeamSick said:
DJay Pro is better timestretch than AudioStretch and it’s not even close.

I’d say it comparable to pitch n time, so I don’t think anything else on iOS is even close. Useful for finding key (most of the time) as well. I just throw a song on dJay, change the bpm then record the whole song on there and chop it on blocs. It’s quick enough.

Yup, this used to be my main sampling workflow. Was one of the reasons I made the iOS Shortcut, "Send Audio to App"

https://routinehub.co/shortcut/5189/

I still use your shortcuts all the time man, especially the video to audio. Every time I use it, I’m amazed at the world we live in where a “consumer” (meaning you) can set something like that up to begin with between various apps, sources. But also the element of you sharing it, me getting it and I end up using this tool from a guy I never met almost daily. It’s very strange when you stop to think about this stuff for a moment.

And I promise I’m not over here munching on magic mushrooms or anything like that, it’s just an amazing world we live in!

Thanks. I’m glad it’s adding value.
Yeah, I get what you mean. I suspect this is how a lot of app developers feel whenever their products are being used.

I’ve been doing the same with Drambo. Some awesome patches on there that others have made, and I’m just scratching the surface of it.

Gavinski

@Obo said:
@Gavinski i tried to kind of quickly recreate what you were doing on audiostretch in soundfruuze. It’s been a while since I’ve used this so not very familiar with controls and features (also appears updated quite a bit since last I recall). Anyway, this can maybe give you a taste of features but let me know if there’s something specific you want to see and I’ll try whatever. Using it feels kind of like that one feature in SAMPLR (the reel or whatever it is...).

Heads up, this is audiobus running SF as IAA. I couldn’t find a way to import audio in Soundfruuze standalone mode, so I loaded Audioshare into audiobus, looped audio file I had saved in audioshare already, then added soundfruuze in the effect slot. Sounds confusing but it’s not (in retrospect, would have used something other than audioshare for the source material as that’s just not a common use, might be confusing!).

I also tried in AUM first as AUV3 effect but couldn’t figure out how to stop the audio playing normal speed in the background (Soundfruuze wanted to play the audio file regular speed at same time as the speed changes so you couldn’t really hear it). Feel pretty confident there’s a way to turn this off but wasn’t finding it and thought this might work just as well.

Click link below to watch (I don’t know how to embed video here)

https://youtu.be/3aAMObw6WqI

Watching now, do t worry, vids get embedded automatically unless you have turned embedding off in youtube. This is sounding very cool, I definitely need to pull soundfruuze out again, thnx

BitterGums

@Obo That's pretty cool. Totally forgot about that app. Is it IAA and AUv3?

Obo

@BitterGums said:
@Obo That's pretty cool. Totally forgot about that app. Is it IAA and AUv3?

Man, me too! @Gavinski mentioned it as maybe being the app he needed and he made me think of it for the first time in a long time. To my surprise, it had been updated since I last used it. Yeah, looks like it’s AUV3 and IAA now. I think I remember it being really touch and go with AUV3 previously but seemed like it was working fine to me in standalone, IAA and AUV3 now. I was trying to mimic something from another vid and AUV3 controls - I wasn’t’ finding what i needed but I think it was just me not using it for a long time more than anything. It seems a lot more polished now than I recall...

Gavinski

It seems crazy good now. @Obo you can get rid of input audio by the way, just turn off 'thru' which is under the 'level' tab if I remember correctly

Obo

@Gavinski said:
It seems crazy good now. @Obo you can get rid of input audio by the way, just turn off 'thru' which is under the 'level' tab if I remember correctly

It really does seem super legit now! I’m shocked how efficient it runs and how much more polished it feels vs what I remembered. I think a lot of people will probably dig it now, really nothing else like it on AUV3. Thanks for clarifying on the thru tab!

stown

Thanks @Gavinski for that really cool video about audioStretch... and someone else on the forum had posted two tracks (elsewhere) that employed a similar technique, but I can’t recall who.... (argh!). Anyway to you both thank you!! Purchased audioStretch and have had some great fun feeding some Gauss instances with scrubbed audio from the app. Definitely will be using this technique on future tracks.