This is my first time posting to nesdev.
I am Japanese and use translation software. I'm sorry if there is a wrong sentence.
The advantage of MMC5'PCM is that it does not affect the volume of APU triangle waves and noise.
I prefer to use both $ 4011 and $ 5011 together.
I will put NSF as an example.
Recommended: NSFPlayer
$4011 : 8.286kHz * 2ch
$5011 : 4.143kHz * 1ch
I will also post what I tried with only 2A03.
You can see that the noise of the APU is a little bad. I think this is due to the influence of the low frequency component of the base.
Also, I had to turn down the volume as a whole because I couldn't afford to mix PCM 3ch for $ 4011.