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#IS 448 KBPS GOOD FOR AUDIO MOVIE#
You know what, most non-audio professionals wouldn't be able to tell a 128Kb/s AC3 movie track from the original DVD in a blind test, let alone 192Kb/s and no original reference track on an A/B switch.īesides, I'm talking about one or two CD DVD rips where it's absurd signficantly degrade the quality of the video for an insignficant increase in audio quality. Not even 96Kb/s per channel? For our other readers who need a more common reference, you're complaining that it's not even 192Kb/s 2-channel(non-surround). Most movies don't have any appreciable audio above 16KHz and even if they did most people don't have any appreciable hearing above 16KHz.
#IS 448 KBPS GOOD FOR AUDIO 320KBPS#
With 320kbps you get only frequencies up to 16KHz I'm betting on the AC3.Ĥ48kbps is MINIMUM for AC3 5.1 (this means not even 96kbps per channel!), because only starting from that bitrate you get full bandwidth up to 20KHz, and that is equivalent to CD quality. It would be interesting to compare these soundtracks with 5.1 speakers and then figure which sounds best. The reason to use AC3 is for 5.1 channels or to preserve the original audio. 5.1: From 192 kbps (good) up to 640 kbps (great/perceptually transparent) Dolby Atmos : From 448 kbps up to 768 kbps (Dolby Atmos is available for members subscribed to the Premium plan) Netflix currently limits Dolby Atmos support to its Premium tier plan, but if you’re an Apple TV 4K user, it’s likely well worth the added cost. The AC3 is CBR and otherwise hasn't been well milked for quality. You will gain nothing by re-encoding it to 448 kbps, and may well decrease the quality simply through re-encoding. They've been milking every bit of quality they can from MP3, including improved modeling, etc.
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384 is the minimum to get decent quality. If you must save some space, 448 is a good compromise, and was often used on DVD. If you're using AC3, I say spend the full 640 Kbps. 384 Kbps will still lowpass filter a lot of stuff out. If there's only a single track and the project is audiocentric. It's 'good enough' but it's not fully transparent. what happened to the other 4 channels in your AC3 (considering you only have two speakers)? How were they combined on playback?Īlso, give LAME some credit. Good defaults are 224 Kbps for stereo and 384 Kbps or 448 Kbps for 5.1 mixes. How were the channels combined for the MP3 (e.g. Was the MP3 volume cranked up and the dynamic range compressed? This might make the same audio sound better to you. Why did 128ABR MP3 sound better than 256Kb/s AC3? For starters, the AC3 had a cutoff of 12.?KHz while the MP3 probably cutoff at around 14.?KHz.īeyond that, consider how the audio was processed. For most movies, 256Kb/s should be acceptable.