dsp
- FiiO X1 PCM5142 DSP blocks: the flat head I believed
Three FiiO X1 firmware blocks the DAC loads per stream looked like passthrough filters, until the decoder read all 2,708 bytes of each one.
- FiiO X1 EQ table: seven register bytes my generator never read
Decoding the FiiO X1's PCM5142 EQ coefficient table: the format was fine, the register bytes were not, and my first proof of the layout was wrong too.