Voder

Voice things.

Crates to try:

hound
- Encoder/decoder
- Very mature (3.4.0)
cpal
- Hardware audio out, low level
- Tons of downloads!
wavy
- Microphone in, speaker out
- ALSA
sample
- convert between floats, u8s, u16s, etc. via a trait
- clip amplitude
- scale playback
- iterators
- signal generators (sine, saw, noise, etc.)
sonogram
- generate spectrograms!
- THEY LOOK SICK!
audrey
- supports range of audio encoders/decoders
- flac, ogg, wav, alac
waveform
- generate images from wave files
- con "it is probably threadsafe"
samplerate
- sample rate conversion
riff-wave
- read and write wav files
- con: old (2016)
wavefile
- con: old (2016)
- con: low on doc
pitch
- determine pitch and volume of samples
- uses "bistream autocorrelation function (bcf)"
- todo: also investigate BACF, uses peaks instead of zero-crossings
libwave
- wav library, based on nom zero-copy parser
- PCM support
- 18/16/32/64 bit support

Hardware

Enumerate hardware:

The linux headphone jack is named at startup:

To change the 'default' speaker,

pactl list short sinks
pactl set-default-sink 'alsa_output.pci-0000_00_1f.3.analog-stereo'
speaker-test -t wav -c 6 -D default

This makes the rust code work on Desktop.