I've seen those same freq dependent steps on so many AP plots that it almost certainly is a measurement artifact. Further to this, suspected Vref artifacts could be interrogated on SE vs balanced OP's as there should be better CM cancellation on the bal OP.... depending on Bal -> SE circuit component tol.Isn't that just a measurement artefact? With a bandwidth of around 21 kHz (44.1 kHz sampling) the third harmonic will "disappear" once your fundamental gets above 7 kHz. There is also a small reduction just above 10 kHz. This could be where the second harmonic is outside the measuement bandwidth.
Has anyone tried AK4191 in async mode?
The PecanPi+ DAC I have runs in ASYNC mode. It works very well.
OK, thanks.
So I can avoid 4137.
Now in my 4499 my DAC, 4191 works always in sync mode, just from USB it uses low jitter oscillator's mclk and from spdif/toslink it uses recovered mclk from the receiver. Will try to make experiments using 4191 async mode from spdif/toslink.
So I can avoid 4137.
Now in my 4499 my DAC, 4191 works always in sync mode, just from USB it uses low jitter oscillator's mclk and from spdif/toslink it uses recovered mclk from the receiver. Will try to make experiments using 4191 async mode from spdif/toslink.
Will try to make experiments
There was no time to do this yet.
But there is a question: does the 4191' asynchronous mode also work for DSD?
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