- 3.5 mm jack (4-pole) for a headset/boom mic combination for gaming or VoIP applications
- 3.5 mm jack for microphone input
- On-board MEMS microphone
- 3.5 mm jack stereo line input for connection to devices such as digital audio players (iPod etc.) or mobile phones
- 3.5 mm jack stereo line output for connection to devices such as external stereo amplifiers or powered speakers
- S/PDIF input and output
- On-board class D power amplifier for external speakers, with connection to external power source if needed.
- Small pin header for extra functions if they are low cost, already on-chip, and don’t require any further components
- Raspberry Pi form factor
It’s currently available for £24, which isn’t at all bad for this quality of kit and is only compatible with Revision 2 Pis – the ones with the extra P5 pads. You don’t need to solder a header onto the pads as the card uses an ‘innovative sprung’ mechanism to connect to the pads. (I’m not sure what that looks like in practice, but it sounds like a very cool, and sensible, way of getting around the P5 header dilemma).