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Apple sound codecs cutting out at 15khz?

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Kar98's Avatar
Member Since: Mar 17, 2006
Location: Texas
Posts: 312
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Mac Specs: Mac mini i5, 2.3Ghz dual core, 8 GB RAM, OSX 10.8.2

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Trailing that story about the cellphone ringtone that;s only audible to teenagers (allegedly), I came upon this page where you can play various files ranging from 10,000 Hz through 22,000 Hz.

I just noticed that Quicktime and iTunes both quit emitting any sounds above 15K. Nope, it's not the speakers. I tried it out on two different Windows PCs, one P4 with Winamp with high$$$ speakers and another one, 7 years old with el cheapo speakers/WMP10 and I can hear them all the way up to 21K on both Windows machines, but only up to 15K on my Mac mini with mid-range speakers. Then I swapped speakers around. Still the same, it's not the speakers, it's the sound Apple/Quicktime sound codec.

Now the dogs are looking at me funny, my ears are bleeding and I'm yet again ever so slightly annoyed with Apple.

PS: Or maybe it's just the super-cheap sound card?

This mean anything to anyone?

Built In Sound Card:
Inputs and Outputs:
Controls: Mute, Left, Right
PluginID: Toonie
Internal Speakers:
Controls: Mute, Master
PluginID: Toonie
PCM 16:
Bit Depth: 16
Bit Width: 16
Channels: 2
Mixable: Yes
Sample Rates: 32 KHz, 44.1 KHz, 48 KHz, 88.2 KHz, 96 KHz
PCM 24:
Bit Depth: 24
Bit Width: 32
Channels: 2
Mixable: Yes
Sample Rates: 32 KHz, 44.1 KHz, 48 KHz, 88.2 KHz, 96 KHz


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