Comments on: RSR161 – Ian Shepherd – How To Keep Your Mixes Out Of The LOUDNESS Penalty Box. https://recordingstudiorockstars.com/rsr161-ian-shepherd-how-to-keep-your-mixes-out-of-the-loudness-penalty-box/ Helping you make your best record ever! Fri, 12 Oct 2018 02:10:43 +0000 hourly 1 https://wordpress.org/?v=7.0 By: Mat Taylor https://recordingstudiorockstars.com/rsr161-ian-shepherd-how-to-keep-your-mixes-out-of-the-loudness-penalty-box/#comment-1971 Fri, 12 Oct 2018 02:10:43 +0000 http://recordingstudiorockstars.com/?p=7449#comment-1971 Howdy Lij,

I was listening to this episode and noted the part in your conversation relating to streaming Bluetooth Audio from a device to the car stereo and the question of audio quality. I had gone down a little rabbit hole to answer these questions for myself and discovered that quality will be dependent on both the sending and receiving devices.

There are multiple Codecs utilized for Bluetooth Audio, the two that matter for this question are APTX and AAC.

If both sending and receiving devices have the APTX HD codec you can achieve sound representative of HD 48k/24Bit at just under 600kbps. MacBook Pro and iMac have this Bluetooth Audio codec.

However if one of those devices, namely iOS (iPhone,iPad etc), utilize AAC, you can expect a lot of degradation from an HD file down to the equivalent of a 256k mp3.

In terms of the practical application of checking your masters on the car stereo, you will still notice the overall impact of the loudness of each master so it kinda doesn’t matter, but just thought in my findings.

Mat

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