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The Stockholm thread. (Gadget 2)
The information collected here will likely end up on wiki.audiob.us one day.
For now, let's collect ideas, tricks, tutorials and everything else around the Stockholm gadget here.
Stockholm is an IAP inside Korg Gadget 2 that provides the only current way of using REX/RX2 files on an iOS device.
REX files are audio files with slice, tempo and beat meter information stored with lossless compression. RX2 is the newer format that supports stereo audio and longer files.
Here's how to load your first loop from the factory set:
- Tap and choose factory preset "039 : Stockholm Init". This will empty all loop slots.
- Tap on slot 1 and preview a few files using the play buttons (triangle) next to each file. Tap on the file name to load the file into slot 1.
- Tap to auto-create notes on the piano roll that trigger each slice at the correct time position. From now on, if you start playback in Gadget, the loop you just loaded will play with its original groove at the bpm you have currently set in Gadget.
- Tap one of the switches to adjust global parameters for each slice. Tap on a slice and drag up/down to adjust the values.
The loop speed will follow any bpm changes in your Gadget project.
By moving the auto-created notes on the piano roll with quantization turned off, you can either fine tune the timing of each slice (left/right) or change the triggered sound by moving the note upwards/downwards or add and remove additional slices wherever you want.
This allows you to build hundreds of variations from just one loop, like in SB Egoist but with more control.
Basically every parameter can be automated as well using standard automation in the lower window of the piano roll.
Comments
Glad you started this, I’ve already learned something
Thank you. I might have to get this before the sales is over!
This thread include a nice video from DJ Puzzle about Stockholm, including a Dropbox link to a rich collection of REX he’s put together over the years. Good dude. Subscribe to his channel,
Forum thread https://forum.audiob.us/discussion/27764/free-rex-files-for-stockholm-and-a-brief-history-of-recycle
One of my fav features of Stockholm is the ‘Alt’ parameter, which randomizes the playback of slices.
Boxed Ear has a good quality CR-78 pack for free:
https://www.boxedear.com/free.html
Samples From Mars sells nice REX packs (CR-78 currently on sale for $1)
https://samplesfrommars.com/search?q=Rex
and of course there’s the famous breakbeats collection:
https://rhythm-lab.com/breakbeats/
I had not realised that the SFM stuff was another source of REX files, I’ll have a hunt through them later. Thanks for pointing that out.
Another idea to get REX files is searching your hard drive, you may already have a pretty bunch. I found a lot of samples as part of an audio plugin and also in some sample packs.
I use "Everything" for searching, which is available for free (Windows) at Voidtools. It’s an excellent search tool, not just for finding REX files
@rs2000 I found the free license for Reason Lite that came with my nanoKey so I will give the REX creation workflow a spin at some point. Did you say that you could create multi-velocity instruments this way?
Excellent tutorial and a fantastic collection of REX/RX2 files! Thanks for the link.
Here's the direct link to the Youtube video:
Not in the classic sense. It's a hack that works well enough for drum and percussion instruments though. I'm placing multiple hit velocities in a sequence and set a slice at the beginning of each so different velocities span multiple keys on the keyboard.
I like this approach because it gives you better control over specific velocities when playing on-sceen or on cheap MIDI keyboards. And changing hit velocities afterwards is just a matter of moving the note up or down in the piano roll.
Cool, that would work well enough for me. Are there any limits on sample/slice length in Stockholm?
That famous breakbeat resource is just nuts, thanks for all this treasure!
@rs2000 thanks for adding the direct link
Not that I've ever hit any of it, only the maximum of 92 slice markers.
Stockholm will even import files with more slices but truncate any audio beyond slice #92.
Note that very long files will require more memory though, I've managed to crash Gadget once after loading many of my huge custom instruments 😅
Glad to hear there are no arbitrarily small limits. How is the workflow for non-percussive instruments? I don’t know what is possible yet but I’m wondering how pitched instruments are interpreted. If I sample an octave or a series of octaves then is there a way of telling either Reason or Stockholm what the sample base pitches are and then it works some magic or do I need to sample every note I want to play? Thanks for answering these questions by the way!
(Edit: thinking of using something like synthjacker to grab samples to a single wav)
@MisplacedDevelopment You're welcome!
Indeed you have to use chromatic samples in order to be able to play them on a keyboard. I usually don't care where I place the first note and change the pitch either on the piano roll (group select => transpose) or while recording in the first place.
But even that isn't mandatory if you plan to play the instrument monophonically.
Let me prepare an example...
So here's an example @Littlewoodg @Artj @R_2 @MisplacedDevelopment @yokotate using only four samples/slices covering almost 4 octaves chromatically.
By the way, I'm always turning the bpm value in the saved RX2 file to the maximum so even when I play a long note, Stockholm won't advance to the next slice too early.
And here's the funked-up version using the great on-board filter:
Funky and educational, what’s not to like? I just hope now that my laptop is modern enough to install Reason Lite...
😊
Here's the REX file if anyone wants to play with it. Download, extract and move the Rx2 file to the Gadget folder in Files.app
@rs2000 Managed to get it working with a few note test sample thanks to your instructions
The two bumps in the road were that I had to double click on the sample in Reason for the bounce to REX option to appear and then I had to unselect something in the self-contain settings window before I could export the file.
I’m not sure I have the patience to use the transpose trick even though I can see it saving a lot of disk space and sample time. Am I correct in thinking that you need two copies of a note for this to work - one to select the slice and then one played at the same time and duration in the transpose part of the keyboard?
Next I’ll use Synthjacker to sample a few octaves of an instrument, although this may trigger some madness from when I spent a lot of time doing this to create NS2 instruments at the end of last year. At least I don’t need to split the sample file this time and it should be pretty quick to do a few instruments in one go once I get the hang of it.
Making sure “stretch and transpose type” is set to all round seems to be important. My first attempt using a 3 octave chromatic sample put transients in very strange places and Google revealed that the stretch type had probably been set to vocal.
Hmmm @MisplacedDevelopment, I have no experience with Reason's REX export, I've always used ReCycle to create mine.
And no, you only need one note that plays the slice. The other blobs in the piano roll are transposing the notes to whatever pitch you need.
It works well enough for me as I got used to it but I understand that it's not a workflow for everyone.
You could still place semitone after semitone into the REX file and play the instrument without any hacks and polyphonically.
Great use of Global transpose in the pianoroll.
Is it me or does the ‘One shot’ key not work (Perf/Keys screen). The ‘Stop’ key also never did anything afaik?
I've never used them. I'm rather using the filter, filter envelope and ADSR like in a synth: The slice plays as long as the note determines it in the piano roll.
My 3 octave chromatic test using 4 seconds per note resulted in a very reasonable 7.4MB rex file, down from a 30 something MB wav file originally. I tried 7zipping the file and it further reduced to 4 and a bit MB which was unexpected. There were probably a dozen transients that I had to remove but this did not take long. All in all a pretty painless workflow, apart from the need to boot the laptop!
Now we're talking! 😃👍🏼
@rs2000 octave chromatic and great use of built-in effect - great use of the module, thank you for the examples!
F%#king kool. Can I back up a sec, I per the usual might’ve missed something. Are y’all using Recycle (or free Reason) to make the REX?
Little demo of the ‘Alt’ parameter in Stockholm. It randomizes the playback of slices within the loop.
You have to trigger the whole loop to make this work, triggering separate slices or ‘Copy loop to track’ doesn’t randomize playback.
This is a 4 bar scene, but because 4 out of 5 Stockholms are randomizing it keeps changing.
Done with the factory Rex files, project attached if anyone wants to check it out (move to: On My iPad > KORG Gadget, and unzip).
I was using Reason Lite which came with the Korg NanoKey software bundle