Tool/software:
We are trying to implement the DEQ and the AGL on the TAS5782M. When we drive our speaker using the TAS5782EVM and control it using the Purepath Console, everything works perfect. However, when we apply the register values to the amplifier in our End System (DUT), the DEQ and AGL are binary in operation regardless of the volume level. In other words, regardless of the output signal level, when the functions are toggled on, they always fully active.
We’ve also connected the Purepath Console to the I2C bus of our circuit and used the In-System Tuning of the End System Integration module to control the device. We have full control of the amplifier, but once again, as the volume level changes from very low to very high, these functions are always in full engagement. If the AGL is set to -10dB, it cuts the output 10dB regardless of volume. If the DEQ has a +8dB bass boost with a low level threshold of -40dB, the amp will apply +8dB boost at all output levels. Note: All these values work perfect in the EVM.
The bottom line is, it simply appears the amp in our End System isn’t detecting its output.
If I remember correctly, the amp is configured for 48k Standard Processing operation, but I can’t be certain about this.
Any thoughts on how to resolve this issue or things to check would be much appreciated.
Thank You!
Oliver