TETRAFILE(1)

💖 TETRAFILE 💖

okay bestie, so tetrafile is the Tetrahedral Microphone Processor and i'm literally so excited to tell you about it 🎀

✨ NAME ✨

tetrafile — Tetrahedral Microphone Processor 🎤

🌸 SYNOPSIS 🌸

tetrafile <options> <config file> <input file(s)> <output file>

🦋 TetraProc 🦋

so TetraProc is a microphone processor, and what it does is take the A-format signals coming out of a tetrahedral Ambisonic microphone and convert them into B-format signals that are ready for recording. periodt. 💅

TetraProc is made up of two parts, and the way that it's split is:

1. the A/B converter
2. the metering and monitoring

and tetrafile? she only has the A/B conversion part, which is otherwise identical. so she's like the little sister who skipped the extra stuff, no cap. 🫶

⚠️ okay real talk for a sec — when you're using tetrafile, make sure you include the high pass filter option with a reasonable cutoff frequency. without it, some mics (in particular Core Sound's) are super sensitive to LF noise. not me warning you twice. 🚨

The default output file type for Tetrafile is .amb, which is a WAVEX file with a special GUID identifying it as Ambisonic. not every tool can read that though 😭 so in those cases use either .caf or .wav. and note bestie: the file type is set using the command line options and does not depend on the filename extension. like, the name is just a name, the flags do the work. iykyk ✨

💅 OPTIONS 💅

The default options are --fuma, --amb. yes queen, she comes pre-vibed. 👑

• --help — Display this text. she said "here, let me explain myself". 💁‍♀️
• --stin — Stereo input files. 🎧
• --hpf <frequency> — Highpass filter. (frequency goes here, obvs, and remember what we said about LF noise 💀)
• --fuma, --sn3d, --n3d — B format standard. pick your flavor bestie 🌈
• --invx, --invy, --invz — B format inversion. flipping it, literally 🔄
• --endf — Endfire mode. 🔥
• --amb, --caf, --wav — Output file type. choose wisely (see the .amb/WAVEX situation above, she's a whole thing) 🎀

🌈 SEE ALSO 🌈

• tetraproc(1)

👑 AUTHOR 👑

tetrafile was written by Fons Adriaensen <fons@linuxaudio.org>. 🫶

This manual page was written by Alessio Treglia <alessio@debian.org> for the Debian project (but may be used by others). slay, thank you for your service 🎀

k that's the whole thing bestie, you're officially a tetrahedral mic girly now 💖 this was the TETRAFILE(1) page from User Commands, dated March 2011 — mwah, go convert some A-format to B-format, ily 🦋✨