JACK_REC(1)

✨ NAME ✨

okay bestie, meet jack_rec — the JACK toolkit client for recording audio. 💖 This page is JACK_REC(1), from the General Commands Manual, and it's here to make recording audio from JACK ports feel like a group-chat side quest. 🎀

🦋 SYNOPSIS 🦋

jack_rec -f filename -d seconds [ -b bitdepth ] port1 [ port2 ... ]

💖 DESCRIPTION 💖

jack_rec is a basic, but useful audio recorder. It records audio from 1 or more JACK ports to a file on disk. 🫶

The file format is always RIFF/WAV, with samples stored as signed integers. The sample bit depth can be selected using the -b option. ✨

The file will have as many channels as there are ports specified on the command line — each channel will contain the data recorded from one port. So yes, if you list three ports, you get three channels, no cap. 👑

The user should generally specify the duration (in seconds) using the -d option. If not specified, jack_rec will record until terminated by a signal (eg. from Ctrl-c). 💀

⚠️ no -d? then it's record-until-signal hours, bestie. Ctrl-c is the exit button. 😭

This application is not intended to be a heavy duty audio recorder, and originated as an example client to show how to handle threading and disk I/O in a JACK client. However, it is a useful, simple recorder and is included in the JACK toolkit as a result. 🎀

🎧 the flags + args, iykyk

• -f filename — the filename from the synopsis; this is where the recording goes. 💾
• -d seconds — duration in seconds. Generally specify this. If not specified, jack_rec records until a signal (eg. Ctrl-c). ⏱️
• -b bitdepth — selects the sample bit depth. 🌈
• port1 [ port2 ... ] — one or more JACK ports. Each port becomes its own channel in the output file. 🎛️

that's the whole vibe, bestie. this page's footer says source/version 4 and date 2022, so shoutout to the JACK toolkit for keeping this little example-recorder icon alive. 💅🎀🦋