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Aug 12, 2014, 02:56 PM
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toslink lives



It may seem strange to use a fragile optical fiber to move 1.4 megabits of data in this world of gigabit wireless, but it was cheaper than buying a new amplifier. Merely enable IEC958 on Mix2005 & the raw digital audio buffer goes straight to the amplifier. The amplifier automatically switches to its own DAC. There's no longer any level control on the computer, no more ground loop, & no more AC hum. The highs jump out a lot more. The amplifier seems to do the full 48khz.

It's probably the best sounding computer in the world, since no-one ever bothers connecting their computer to a decent speaker, let alone digitally. Computers were still supporting the 30 year old optical audio standard until 2010. There was never any need to bother with RCA cables, since the optical cable was $3. Nowadays, they all use bluetooth.

The next logical step was of course digital audio from the cp33 -> amplifier.


Time once again to open it up to flash a smaller fragment size. With the fragment sizes optimized as small as possible, the delay was estimated at 7ms. Unfortunately, it was a waste. The delay was noticeable. There was no difference in the amount of hiss. It probably wouldn't be robust enough to record anything. The experiment did reveal that Zone 1 changed amplitude in the digital stream, so all the recordings were overloaded. It still might be useful to eliminate ground loops.

Having never played with bluetooth audio besides the crappy old phone headsets, would assume bluetooth audio had the worst latency. USB standards compliant audio probably has the latency of a soundcard, with toslink still the only thing down to single sample latency.
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