v0.1.0

• This repository is audioif, the audio hardware layer, and public. It was
  the private audiopump driver repo until today; the name belonged to the DSP
  repository, which is audiodsp now.
• First public shape. The audio pump's platform driver: the _audioif C
  module (i2s_start with a one-port and a two-port form, i2s_stop,
  i2s_dma_bytes, i2s_rx_bytes, Input, rt_probe) and a
  CircuitPython-shaped audiobusio.I2SOut (play, stop, pause, resume,
  playing, paused, deinit, plus retarget(), .status and starved()).
  Drivers for ESP32 (a pinned FreeRTOS task and the I2S peripheral), unix
  (pthread) and Windows (_beginthreadex); WebAssembly and any port without
  threads run the engine through audiopump.service() and need nothing from
  here.
• The portable half — the pull loop, the ring, the event queue, the tap and the
  lock as port hooks — lives in
  audiodsp. This repository binds to
  it by defining audiodsp_port_driver().
• Proved on an ESP32-P4 (ES8311 codec) and an ESP32-S3 (MAX98357A amplifier),
  on unix and on Windows. What is open is in the issues.

Build it beside audiodsp in a cmods workspace; the README has the two links and the command. It is a firmware C module, so there is nothing on PyPI or MIP to install.