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Topic: AAC-LC or HE-AAC best @ 90/100 kbps ? (Read 1194 times) previous topic - next topic
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AAC-LC or HE-AAC best @ 90/100 kbps ?

Hello. Welcome opinion. Assume;

ffmpeg 6.1.  libfdk_aac.  -cutoff 15000.  Stereo.  CBR.

Content is a mix of talk and pop/rock music (WAV/CD). Encoding two inhouse fixed bandwidth streams for studio to FM transmitter links;

#1. 90 kbps.
#2. 100 kbps.

For #1 & #2 typical best audio quality; HE-AAC or AAC-LC?  32 or 44.1 kHz?

Thanks.





Re: AAC-LC or HE-AAC best @ 90/100 kbps ?

Reply #1 –
I think at these bitrates and with that frequency cutoff, SBR (a technique used in AAC-HE to approximate high-frequency content) may do more harm than good. I think AAC-LC may perform more consistent in that scenario.

However, I recommend doing your own listening tests with typical content you'd like to transmit.

Re: AAC-LC or HE-AAC best @ 90/100 kbps ?

Reply #3 –
For optimal audio quality in a fixed bandwidth scenario, AAC-LC at 44.1 kHz is recommended for both 90 kbps (#1) and 100 kbps (#2) streams.