Analog Audio Input
No Bolt generations have support for analog audio input -- only embedded audio is supported.
Embedded Audio Input
All 1st, 2nd, 3rd and 4th generation Bolt units support (2) channels of embedded audio on either HDMI input or SDI input.
Audio must be embedded in the first SDI channels, and in PCM (not encoded or compressed) format.
Audio compression is done at 48 kHz, 24-bit PCM format.