Audio
BlueSCSI can play the audio tracks from CD-ROM images (mixed-mode CDs and Red Book audio CDs) out to a real audio output. This needs an external DAC board, a firmware build that supports audio.
There are two paths depending on your board:
- BlueSCSI v2 (Pico based) uses an external S/PDIF adapter board wired to the Pico.
- BlueSCSI Ultra uses the Ultra Audio Board, which only works with Ultra.
BlueSCSI Ultra uses the dedicated Ultra Audio Board for I2S audio output. This board only works with Ultra and is not compatible with the Pico based BlueSCSI v2.
Flash the standard Ultra firmware (BlueSCSI_Ultra*.uf2); audio support is included in the Ultra build.
NOTE: This will work on any BlueSCSI rev even if it doesn't have a Qwiic connector, see wiring below.
- A BlueSCSI v2 with a Pico 1/1W or Pico 2/2W module.
- The S/PDIF Qwiic adapter board avalible from most distributors.
- Or wire up your own S/PDIF DAC.
- The Audio SPDIF firmware build for your Pico (see below).
- A S/PDIF capable amplifier or DAC.
The standard Universal firmware does not output audio. Flash the matching Audio SPDIF build for your hardware:
| Your Hardware | Firmware File |
|---|---|
| Pico 1/1W + DAC for SPDIF audio |
BlueSCSI_Pico1_Audio_SPDIF_*.uf2 / .bin
|
| Pico 2/2W + DAC for SPDIF audio |
BlueSCSI_Pico2_Audio_SPDIF_*.uf2 / .bin
|
See Updating Firmware for how to flash.
NOTE: Use the Audio SPDIF firmware only when you have the DAC connected. It disables I2C support, which is used for OLED displays and Qwiic accessories.
Make the following three connections between the BlueSCSI and the S/PDIF adapter board:
| S/PDIF adapter board | BlueSCSI |
|---|---|
| S/PDIF In | Pico GPIO 16 (S/PDIF output pin) |
| GND (one or both) | Any ground pin |
| +5V | VBUS on the Pico |
