AudioInjector Isolated DAC and ADC Sound Card for The Raspberry Pi

Features Raspberry Pi 40 pin standard header (suits Pi 0, 2, 3, 4 & expected future versions) Isolated acoustic pathway allowing further simplification in analogue design Isolated acoustic pathway ensuring no embedded nor mains grid noise only acoustic pathway Main soundcard with all input, output and mute codec lines broken out Main soundcard with +-12V and phantom power lines provided Main soundcard with GPIO lines broken out for preamplifier control Preamplifier boards (skins) are interchangeable. Preamplifier board can be changed for different ones with other features. We have future proofed the preamplifier connectors to allow all sorts of different designs to be made, for example microphone preamps, headphone amps, phono preamplifiers. Build your own preamplifier PCBs and attach them (implements the Audio Injector Analogue Breakout Standard v1) Integrated into Linux (for Rasbian - Raspberry Pi) and the ALSA machine driver is easily ported to other Linux based embedded systems. Specifications 192 kHz sample rates, 24 bit audio words, using the cs4272 codec Suitable preamplifiers available (check their pages here or on the shop). Ships with a 40 pin header assembled, a second header slot on the sound card not assembled for you to use. Isolation hardware (magnetic) On the chip audio mixer to control the sound levels and features. DC coupled - no AC coupling caps Main sound card DAC Full Scale (FS) peak to peak output voltage : 4.8 V Main sound card ADC FS peak to peak input voltage : 5.65 V Main sound card closed loop gain (4.8/5.65) : -1.42 dB FS voltage levels are accurate to the tolerances of the cs4272 codec (specified in their data sheet).