💾 Archived View for nanako.mooo.com › programming › remiaudio.gmi captured on 2023-07-22 at 16:29:56. Gemini links have been rewritten to link to archived content

View Raw

More Information

⬅️ Previous capture (2023-01-29)

➡️ Next capture (2023-12-28)

-=-=-=-=-=-=-

The Scarlet Devil Mansion :: RemiAudio

RemiAudio is a collection of audio format I/O routines, codecs, and DSP processors/effects written entirely in Crystal.

Source Code

Features

WAV format support

• Reading of WAV files
• Writing of WAV files
• 1 to 24 channels
• Sample rates from 8000hz to 352800hz
• Integer sample formats: unsigned 8-bit, signed 12, 16, 24, 32, and 64-bit
• IEEE Floating Point sample formats: 32-bit and 64-bit
• μ-law and A-law sample formats

Au format support

• Reading of Au files
• Writing of AU files
• 1 or 2 channels
• Integer sample formats: unsigned 8-bit, signed 16, 24, and 32-bit
• IEEE Floating Point sample formats: 32-bit and 64-bit
• Sample rates from 8000hz to 352800hz

Encoders/Decoders

• MPEG-1 Layer I, II, and III (MP1/MP2/MP3) (decoding only)
• FLAC (decoding only)
• YM2610 ADPCM-A codec

[ ] YM2610 ADPCM-B codec

• High quality μ-law and A-law codec

Processing

• Bit-depth conversion with optional TDPF dithering
• Sample format conversions

[/] Sample rate conversions (partially implemented, see NOTES file, and Known Issues section below)

Filters

• Multi-mode biquad Filter (lowpass, highpass, bandpass, notch, allpass, peaking EQ, lowshelf, highshelf)
• Separate biquad filter optimized for lowpass usage
• Lowpass filter similar to what’s found in a CEM3394
• Lowpass filter similar to a SSM2040
• “Hornet Filter”, a fun approximation of an EDP Wasp’s lowpass filter
• Lowpass filter similar to what’s found on a Korg MS-20

Effects

• Soft clipping
• Stereo enhancement
• Zita-Rev1-based reverb effect
• Freeverb-based reverb effect (Schroeder class)
• Chorus effect inspired by an 80s synth with model number ending in “-60”
• Parametric EQ, mono and stereo variations, with an arbitrary number of bands

Other

• Windowing functions (Blackman, Blackman-Harris, Hamming, Nuttall, Blackman-Nuttal, Hann)
• 100% Crystal :D