Question: CPU tells HDD to copy MP3 to RAM, CPU copies data into cache, what does it do to manipulate it before sending it to the audio card
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Replying to @SwiftOnSecurity
I remember years ago there being so much emphasis on audio cards, but if they just play PCM decoded by the CPU what do they even do?
31 replies 5 retweets 32 likes -
Replying to @SwiftOnSecurity
Some do hardware mixing of channels and such, but if you already have a DMA controller, a soundcard is basically just...
1 reply 0 retweets 0 likes
Replying to @RichFelker @SwiftOnSecurity
...a single DMA-targetable register (per channel) hooked up to a DAC.
8:22 PM - 14 Sep 2016
0 replies
0 retweets
1 like
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