InQodec is a free USB audio codec firmware for the Raspberry Pi.

Download the latest version here ...
https://cdn.ipdtl.com/inqodec/inqodec-1.059.zip

Build an IP codec with a Raspberry Pi and a USB microphone

Follow our step-by-step installation guide here.

• Supports Opus, PCM, G722 and G711
• Reactive interface, for desktop and 3.5'' and 7'' touch screens
• Fully remote controllable from a browser
• Contact list and quick dial buttons
• Multiple SIP accounts with destination based routing
• Connects with ISDN and PSTN (sip.audio only)
• Supports AES67, integrates with Dante, Ravenna and Livewire+.
• Support for volume and mute buttons on USB hardware
• Small footprint, high performance: Runs on any Pi with an Ethernet interface.
• Simple one-click firmware updates

InQodec is based on Raspbian and the system can be accessed via SSH on port 77. There's also a getty on tty2. While root logins are permitted, you need to reset the root password first. To do this, mount the card's rootfs on a system that can read an ext4 filesystem and edit /etc/shadow. Replace the first line for the root user with
root:$6$rRI3IU719IfwweWN$gEMWNxecNJrs5TBk/XBrCG50ah.JVbuOsorGSiqC4hSPG6XJicOSqwnXxvaex1JxA8bNLMsJCOnYTsLM3sNU40:18282:0:99999:7::: This will set the root password to 12345. Make sure you change it afterwards!

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