When using the TAS5805, with a 100Hz sine wave and a 16kHz sampling rate, obvious high-frequency noise occurs.
The schematic diagram is as follows:
The captured speaker waveform is as follows:
I would like to know how to resolve this abnormal speaker waveform issue, and whether it is a software or hardware problem;
Which aspect should I start with to make improvements?
您好
as i know, tas5805 doesn't support 16khz.
does it happen in other fs rate?
also, the output waveform you captured is squared waveform?
it is the one side output? or the differential output?
抱歉,没有表达清楚,tas5805设置的参数如下:
数字音量为12db，其他参数默认，左右通道都是处于播放状态；
上面抓取的波形是OUT_X的一端，滤波前的一级
之前我们根据另外一个案列将din拉低到gnd播放发现会有噪音，硬件经过处理后没有噪音了；但是当播放100hz正弦波依然有高频噪音，是一直持续的滋滋的声音，目前没有找到有效的解决办法，请教一下有哪些地方可能造成该现象
目前解决了
看寄存器时能够使用8到96khz的采样率
前面又提到支持32到96khz采样率
目前来说切换为48khz没有问题，没有试过其他的，怀疑是内部重采样导致的音质失真
