FN ACID
函数 Acid · M-VAVE FM-1 的自制固件 · 0.33 测试版Function Acid · a custom firmware for the M-VAVE FM-1 · 0.33 test
一台 303 式的 acid 机器，每条轨都是一条函数曲线：横轴是时间，纵轴是音高，屏幕上画出来的线，就是你听到的声音。
A 303-style acid machine where every track is a function curve: time across, pitch up. The line on the screen is the sound you hear.
- 16 步 303 式音序
- 16 steps, the 303's way
- 4 轨 ACID · BIO · KICK · PERC
- 4 tracks: ACID · BIO · KICK · PERC
- 8 条预设旋律
- 8 preset lines
- 4 层梯形滤波
- 4-pole ladder
- 录旋钮动作
- knob motion
- 按住 FX 的效果层
- hold-FX punch-ins
01安装Install
- 先备份 SLOOP 的工程SLOOP 编辑器 → Projects → Backup。FN ACID 读不了 SLOOP 的工程；刷回 SLOOP 后可以恢复。
- Back up SLOOP firstSLOOP editor → Projects → Backup. FN ACID cannot read SLOOP's projects; restore them after going back.
- 用 USB 线直接插电脑要能传数据的线，不要经过 Hub 或转接器；FM-1 开机。关掉其它用 MIDI 的软件。
- Plug the FM-1 straight into the computerA data cable, no hub or adapter; switch it on. Close other apps that use MIDI.
- 用电脑上的 Chrome 或 Edge 打开本页要 Web MIDI。浏览器问 MIDI 权限时选“允许”。
- Open this page in Chrome or EdgeIt needs Web MIDI. Allow MIDI when the browser asks.
- 按下面的按钮，等它走完两三分钟。FM-1 会自己重启，屏幕变成荧光绿的 FN ACID。
- Press the button and let it finishTwo or three minutes. The FM-1 restarts by itself into the lime FN ACID screen.
写入时别切走这个标签页，也别最小化浏览器：后台标签页会被浏览器限速，每块数据之间的等待从 10 毫秒变成约 1 秒，整个过程会慢好几倍。也别拔线。Keep this tab in front while it writes and do not minimise the browser: a background tab is throttled (each block waits ~1 s instead of 10 ms), so it gets many times slower. Do not unplug.
这是测试版，可能不稳定。自制固件造成的任何损坏或问题，作者不承担责任，请自行判断是否使用。This is a test build and may be unstable. The authors accept no responsibility if your FM-1 is damaged or misbehaves; use it at your own risk.
02每一版改了什么What changed
- 0.332026-10-20
- 存档：按住 SAVE，点白键 1–7 = 读出 U1–U7，长按（0.7 秒）= 存进去
- ACID 最多 32 步：LENGTH 拧过 16，新的步先复制原来的线；再按一次 SEQ 翻到 17–32 步
- 混音：按两下 GLO 进 MIX 页，四个旋钮 = ACID / BIO / KICK / PERC 的音量
- Slots: hold SAVE, tap white key 1-7 = load U1-U7, hold it 0.7 s = save
- ACID up to 32 steps: past 16 the new steps start as a copy; press SEQ again for steps 17-32
- Mixer: GLO twice = MIX, the four knobs = ACID / BIO / KICK / PERC levels
- 0.322026-10-19
- 滤波器换成 303 那种 4 层梯形（声音更圆、共振更集中）；原来的 2 层 SVF 在 EDIT › ACID › TYPE
- 8 条预设旋律连音色一起载入：按住 HOME + 白键 9–16，或 STEPS 页拧 PRESETS
- 录旋钮动作（X0X 的做法）：播放时按 REC，拧 CUTOFF / RESO / ENV / DECAY，录进 4 小节
- 0.31 存过的状态会保留
- A 303-style 4-pole ladder filter (rounder, a more focused resonance); the 2-pole SVF stays on EDIT › ACID › TYPE
- 8 preset lines, each with its sound: HOME held + white keys 9–16, or the PRESETS knob on STEPS
- Knob motion (as X0X records it): REC while playing, turn CUTOFF / RESO / ENV / DECAY, 4 bars
- A 0.31 save still loads
- 0.312026-10-19
- 到处只有一个版本号（安装页 = 开机画面）；网站上线 fn-acid.netlify.app
- 安装页提醒：写入时让标签页留在前台
- One version number everywhere (this page = the start screen); the site on fn-acid.netlify.app
- The installer asks to keep its tab in front while it writes
- 0.32026-10-19
- DECAY 改成 303 的范围：按步模式 200 毫秒到 2 秒，屏幕显示毫秒
- 加了一点小混响（FX 按两下 = SPACE 页）
- HOME + 白键 10（FILM）连视频里的音色一起载入
- 修了延时反馈过大时停不下来的问题
- DECAY over a 303's range on the steps: 200 ms to 2 s, shown in ms
- A small room after the delay (FX twice = SPACE)
- HOME + white key 10 (FILM) loads the film's sound too
- The delay no longer runs away at high FEEDBACK
- 0.22026-10-19
- 开机是一张空白页；ACID 改成按步写（音 / 连音 / 休止，重音、滑音），公式还在
- 延时换成视频里的附点八分乒乓回声
- FX 层：按住 FX 再按住白键 = 效果一直在，松手恢复；10–14 直接对曲线做运算
- A blank start; ACID plays 16 steps you write (note / tie / rest, accent, slide), the formula one knob away
- The acid film's dotted-eighth ping-pong delay
- The FX layer: hold FX + a white key; keys 10–14 are operations on the curve (y + 12, mirror, x / 2, 2x)
- 0.12026-10-19
- 第一版：函数 Acid 的四轨引擎移植到 Dinghy 平台
- The first build: Function Acid's four-track engine on the Dinghy platform
从 0.3 起每次加 0.01；安装页和 FM-1 开机画面显示同一个号。完整记录在 Each update adds 0.01 from 0.3 on; this page and the FM-1's start screen show the same number. Full history on GitHub.
03想回去 / 刷坏了Going back / if it goes wrong
SLOOP
打开 SLOOP 的安装页 按 Install，再用 SLOOP 编辑器把备份恢复。
Open SLOOP's installer, press Install, then restore your backup in the SLOOP editor.
FM-1 Firmware Hub
在 thefirmwarehub.com 选任何一个 FM-1 固件（SLOOP、X0X、Felucca……）装回去。
Pick any FM-1 firmware (SLOOP, X0X, Felucca …) on thefirmwarehub.com.
USB 救援模式
USB rescue
开机就崩或黑屏：按住 OCT− 再开机，只剩升级通道，然后用本页或上面任何一个安装页重新刷。连续两次开机崩溃，它也会自己进救援模式。
Crashes at start or a black screen: hold OCT− while switching on (only the update path runs), then install again from any installer. Two crashed starts in a row enter it by themselves.