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"Skiff 2.5 is out: free, open-source firmware that turns the M-VAVE FM-1 into a six-track groovebox, and M-VAVE's SMK-37 Pro keyboard too. With 2.5, Skiff is nearly feature complete. This video builds one lo-fi song from a new project, press by press, and shows every new feature on the way: two cores and 16 voices, FREE TAKE (play first, keep it after), STRUM, a pad and a pluck made from scratch and saved with their sends, the true-stereo delay with PAN reaching it, FX › DELAY and FX › REVERB, NOTES: DELETE, FILTR, a song you can follow and start from any entry, KEEP SENDS, CLEAR SONG and CLEAR TRACKS, HOME's new views, LARGE keeping the names, 2.2's voices against 2.5's, REMOTE's knobs, and the same Skiff on the SMK-37 Pro, each combination as it is printed.

How it was made: Skiff's screens and sound are Skiff 2.5.1's own code, the firmware's source run on a computer, so the sound and the screens line up to the frame. Every key, button and knob shown is a press performed in the firmware, step by step; the takes are scripted to play like hands, a slip included. The sounds are factory sounds, apart from the three made in the video: TAPE PAD, RAIN PLUCK and DUSTY KIT. REMOTE's CCs are sent from a computer, as a controller would send them. The sound is the firmware's own, only levelled for YouTube. The FM-1 is drawn in 3D and the SMK-37 Pro flat, their screens Skiff's own display.

▶ Get Skiff (free, GPL-3.0): https://github.com/illuminus5/skiff
▶ From 2.2: every FM-1 moves to MENU › SYSTEM › CPU 2 CORES once (16 voices); songs keep a mono delay; undo keeps 6 levels.

Chapters
0:00 Skiff 2.5: 16 voices, a stereo delay, a song from scratch
0:20 Nearly feature complete: what's in this video
1:05 A new project: NEW on any slot, 2 CORES, 16 voices
2:01 Play first: FREE TAKE
4:56 STRUM
5:40 A pad from scratch
8:38 Wide: the true-stereo delay, PAN into it, FX › DELAY and REVERB
10:35 Save it, with its sends
11:29 A lead from scratch, a second FREE TAKE, NOTES: DELETE
15:05 Bass, rain, drums, FILTR, the PRESETS cards
20:26 A song you can follow: from any entry, KEEP SENDS, CLEAR SONG, CLEAR TRACKS
27:13 HOME's new views, LARGE keeps the names
29:37 2.2 against 2.5: the same chorus, only the voices differ
30:35 REMOTE's knobs
31:38 The SMK-37 Pro
35:09 The song: Rain Tape
37:35 What's fixed, what's next
39:05 Every 2.5 combination, FM-1 and SMK-37 Pro

The song: 'Rain Tape', lo-fi at 84 BPM in C major, 48 bars: intro, verse, chorus, break, chorus, outro. LOFI PIANO strums Fmaj7, Em7, Dm7, Cmaj7, then the chorus's Fmaj7, G7, Em7, Am7; TAPE PAD holds the same chords, wide; UPRIGHT, made rounder, follows the piano; RAIN PLUCK plays the tune, its echoes from side to side; RAIN far down; LOFI KIT, and DUSTY KIT through FILTR, on the drums.

Credits
Skiff by illuminus5.
Built on Felucca by Leo Kuroshita, Hügelton Instruments (GPL-3.0): https://github.com/hugelton/Felucca. The drums play Felucca's DRUM voices.
The piano: the SAMPLE engine's PIANO, a Kawai grand from Versilian Studios' VCSL (CC0).
The bass: the PHYS engine, models from DaisySP by Electrosmith and Emilie Gillet, and from Emilie Gillet's eurorack code (MIT).
The second core: as Felucca 1.6.1 has it, its start code from X0X by charlesvestal, after Melodee by keremimo, with Jangada's measurements by zednaked.
Thanks to iban01-n (#107), michaelmon1203 (#110), lxt548-gif and b13nn (#111), b13nn and LevienBrugman (#101), Section25 (#83), klausw (#97), aehk and JusticeBublitz (#90), solitairethegreat1 (#95), and Big Umami, whose review asked for more voices and wider effects.

M-VAVE, FM-1 and SMK-37 are trademarks of their respective owners. Skiff is not affiliated with or endorsed by them."