6/26/2023 0 Comments Usb 2 vs usb 3 dacSo given that the possibility of having over 60 channels on USB 2.0 already already exists, a number of channels which is overkill for just about any home recording setup (and most professional studios), then there's really no current need for an audio interface to use USB 3.0 in terms of how many channels you can record or play back. USB 3.0 can transfer a whopping 5 Gbit/s, or to put it another way, it has more than 10 times the bandwidth of USB 2.0 (5 Gbit/s = 5,120 Mbit/s). This is the equivalent of over 63 channels of audio at the highest sample rate and greatest bit depth of the audio interfaces and DAWs currently available (280 / 4.4 = 63.63). USB 2.0 can transfer 480 Mbit/s but has an effective throughput of 280 Mbit/s due to the overhead of the transfer protocols. That's equal to 4.4 Mbit/s (I've rounded it up by approximately 0.01). This equates to 192,000 x 24 = 4,608,000 bits of data to be transferred every second for a single channel of audio. That means we have 192,000 samples per second (I'll write 'per second' as '/s' for the rest of this article) with each one using 24 bits.
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