Many people still remember from MP3 times that it should be 320 kbit/s if possible. However, AAC is much more efficient than MP3, so the bit rates are not directly comparable. Of course, 320 kbit/s AAC is also better than 256 kbit/s, but in fact you can live with it very well.
Beatport Streaming for djay Pro on Mac offers 128 and 256 kbps AAC audio quality, as well as lossless FLAC audio.
Beatsource Streaming for djay on Mac offers AAC streaming at 128 kbps and 256 kbps, and lossless FLAC audio. The higher quality streaming is available with the Beatsource Streaming Pro+ subscription.
SoundCloud Go+ subscribers can stream music in high quality at 256 kbps AAC, which is comparable to 320 kbps MP3
This is the screenshot from my Djay library preferences, so yes, it’s true:
All of them support steam separation from djay Pro