X0X 0.10.1-beta

• No more zippering when you turn volume, pan or the sends quickly: part volume, pan and sends, the master volume and every drum voice's pan now glide over about 10 ms instead of jumping.

X0X 0.10-beta

• Fixes the brightness freeze: setting BRIGHTNESS low could freeze the FM-1, and it then stayed stuck at the boot screen (dim, no input) even after reinstalling. The setting is gone, a saved value is ignored, and the screen is always at full brightness. If your FM-1 is stuck, install 0.10-beta from the web installer.
• Stereo: every part has a PAN (its SENDS page, or MIX > PANS), and so does every 909 voice and 808 track (the last setting on its page). With everything centred it sounds exactly as before.
• Stereo reverb, and a ping-pong delay (PING on the FX TAPE page; delay times over one second stay centred).
• TRS MIDI IN: notes, clock and transport from the TRS jack, the same as over USB.

X0X 0.9-beta

• USB audio: the FM-1 shows up on a computer as a 44.1 kHz audio input ("X0X FM-1"), no driver. It is resampled to the computer's USB clock, so live monitoring (an AU host, a DAW) doesn't drift or drop out.
• USB MIDI clock and transport fixed: clock, Start, Stop and Continue sent over USB were ignored; X0X now follows a DAW's clock and transport.
• Fewer dropouts on busy patterns: audio renders in 11.6 ms blocks, so a heavy step no longer overruns (adds 5.8 ms of latency).
• 808: voices stop once their tail is 60 dB under the hit, saving CPU without changing what you hear.
• 303: holding a step no longer toggles it (only a tap does); holding or editing a step follows KEY SOUND like the drum keys, so it's silent while the pattern plays.
• TB-3PO: the GENERATE and SCALE knobs no longer rewrite the line; they set up the next OCT+ (new line) or OCT- (mutate). The screen marks changed settings with a star.

X0X 0.8-beta

• Fast knob turns count: a quick flick no longer gets lost (the encoder decoder keeps up with skipped states)
• Overload guard: when the FM-1 nears its CPU limit, the 303s drop oversampling and the 808's tails end sooner instead of dropping out; GUARD shows next to the audio load, and the performance page counts how often it engaged
• Less screen tearing: the display runs at 60 MHz, the main area sends only what changed, and both halves change together. Some tearing remains: the FM-1 has no tearing-sync line

X0X 0.7-beta

• Knob acceleration by speed: turn slowly for single steps, quickly to sweep (a fast half turn covers the whole range).
• GLO > BRIGHTNESS: the screen's brightness, 1 to 8.
• tools/upload_breaks.py: no longer crashes when given more loops than fit; retries a write the USB link lost.

X0X 0.6-beta

• Knobs and LEDs under load: the key/knob/LED matrix scan now keeps its rhythm while the audio renders. Fast knob turns no longer lose their steps, and the LEDs no longer flicker with the audio load. (Found on the first hardware run.)

X0X 0.5-beta

• Undo and redo: HOME + REC / HOME + PLAY, up to 32 steps, for sounds, patterns, the song and knob motion (CLEAR PATTERN and FACTORY RESET included). The screen says what was undone.
• AUTOSAVE (GLO, on by default): while stopped, changes save themselves after 4 s of quiet. Saves now write only what changed.
• Help cards: hold any button for a second to see what it does on the current screen, with its combinations.
• Safe mode: after two failed starts X0X starts with no sound and USB on, so the web installer can always reach it (it used to drop into the chip's update mode, which no installer can see). PLAY tries again.
• After a crash, the next start says so and shows where.
• The web installer can put M-VAVE's stock firmware (FM-1 V15) back.
• The browser version can load your own breaks.

X0X 0.4-beta

• Black drum keys select silently while the pattern plays (new GLO > KEY SOUND, default STOPPED); they still sound when stopped and with REC on. ALWAYS keeps the old behaviour.
• The 303 lines start empty, like the drums: a fresh FM-1 (or FACTORY RESET) no longer plays two generated lines. OCT+ on TB-3PO writes one. Saved projects are unchanged.
• Delay: a division longer than the 2 s line (1/2. below 90 BPM, 1/2 below 60) now halves and stays on the beat instead of being cut off the grid.
• GLO > ABOUT shows the real version (every release said 0.1).
• New: X0X in the browser, https://charlesvestal.github.io/fm1-x0x/emu/
• New: recovering an FM-1 that won't start, from a Mac (manual, Troubleshooting).

X0X 0.3-beta

• Fixes the crash on hardware ("X0X CRASH" screen soon after start): a divide-by-zero trap fired in the master limiter. The trap is off and the divide is clamped.
• Includes the PERFORMANCE screen and PERF TEST (GLO menu) from 0.2-beta.

X0X 0.2-beta

Still not run on a real FM-1. This build measures itself, so the first install tells us what the FM-1 can do. Installing is at your own risk; M-VAVE's updater (M-UPGRADE) puts the official firmware back.

Please run the performance test: GLO > PERFORMANCE, then SEL > RUN PERF TEST. It plays three built-in patterns for about 15 seconds, puts your project back as it was, and shows a table. A photo of that screen is the most useful thing you can send.

• Install: https://charlesvestal.github.io/fm1-x0x/install/
• Manual: https://charlesvestal.github.io/fm1-x0x/manual/

Changes since 0.1-beta:

• PERFORMANCE page: clock, audio load and peak, dropouts, each part's share of the CPU; RUN PERF TEST
• Big-beat factory mix (break up front, 909 kick under it, RAT 303s into tape delay, a pumping master)
• No clicks on the kick: the 909 kick's attack back to 9W9's, the pump eases in, a look-ahead limiter
• Cheaper engines: silent parts skipped, lighter master, faster tanh, a RAT clipper without square roots or divides
• The manual rewritten in plain sentences, with a Getting started tour