Hello driver developers! Wich setting use the firmware for the PCMSEL bit 1 of the audio decoder control register (AUD_CTRL_REG) in the TMS320AV7110:
a) 0 for 16-bit PCM output or b) 1 for 18-bit PCM output (default)? This difference is very important for the 16-bit Audio-DAC of my Siemens DVB-C (rev. 1.5), the AKM AK4309B (http://www.asahi-kasei.co.jp/akm/en/product/ak4309b/ak4309b.html). The sound of the analog output of the Siemens DVB-C is not very good (like an old 8-bit soundcard). In contrast the sound of the SPDIF output is much better (tested with an external connected DAC). I have compared the specs of the DSP and the DAC: In 18-bit PCM output mode, the audio decoder produce an 24-bit stream on the PCM output. The first 6 bits are zero, followed by the 18-bit PCM value. The Audio-DAC ignores all preceding bits of an PCM bit stream with more than 16 bits. As a result the Audio DAC processed the lower 16 bits of the 18-bit PCM values and this is could be the reason for the badly sound. Over again, wich output precision use the firmware? Can I force the 16-bit PCM output mode? Perhaps my estimation is not correct an you have a better explanation? greeting Christoph Oesterheld -- Info: To unsubscribe send a mail to [EMAIL PROTECTED] with "unsubscribe linux-dvb" as subject.
