Other Parts Discussed in Thread: TAS5711, TLV320AIC3254
Hello,
I have an issue regarding the PCM5242 HybridFlow-6 DRC.
Issue: When the input signal level is higher than the threshold (i.e. -20dB), the frequency response is not flat.
Our customer is using HPF6 with DRC region2 ratio 5. He think the frequency response should not be affected by the DRC. Could you please provide suggestion?
Testing condition:
1. Hardware, PCM5242 EVM
2. PSIA input LRCLK=44.1kHz, MCLK=22.5792MHz, MCLK/LRCLK ratio = 512
3. AP measurement mode: Frequency Response, generator 20Hz to 20kHz, Pre-sweep=100ms, sweep=2s, levels= -10/-15/-18/-20/-40dBFS
4. Configuration in PPC 2 is using HybridFlow -6. DRC region2 ratio=1, other DRC parameters and Biquad/ DBE.. are same as default.
Result: please see the attached frequency response capture. The frequency response of -10/-15/-18/-20dBFS are affected.
Many thanks and regards,
Tom