[oefrha]

Reduced bandwidth obviously leads to better quality at the same target bit rate. Phone speakers are good enough to reproduce some obvious compression artifacts of, say, 32k/64k HE-AAC, let alone higher end headphones. ABR could definitely help.

[awill]

>>Reduced bandwidth obviously leads to better quality at the same target bit rate

or, more likely, lower bandwidth at similar quality.

[dehrmann]

> Phone speakers

Hmm... You could detect the output type (built-in speakers, headphones, bluetooth) and change the audio quality accordingly.

[oefrha]

The phone speaker mention is a response to gp’s claim that “phone speakers aren’t good enough to notice”, which is not true. We’re not talking about 128k aac vs lossless here.