dasbin
Well-known member
Hi guys.
I have a MOTU 1224. The clock is the weakest point - the converters are actually very good for their day: AK5392 ADC's, AK4393 Main DAC.
I don't have a very good understanding of how clock is derived in units like the MOTU - if it is generated by the DAC or by a seperate chip. I found a programmable PLL generator chip on the board (Cypress CY2081) but its data sheet doesn't specify any usage for audio - perhaps it is just being used for the FireWire-like interface? In any case, the CY2081 is an older chip, and has been superceded by what seems to be the superior and possibly pin-compatable CY22381. I am considering swapping this one in.
Could someone explain what this PLL chip is likely being used for, and what my DIY upgrade options might be? Thank you.
I have a MOTU 1224. The clock is the weakest point - the converters are actually very good for their day: AK5392 ADC's, AK4393 Main DAC.
I don't have a very good understanding of how clock is derived in units like the MOTU - if it is generated by the DAC or by a seperate chip. I found a programmable PLL generator chip on the board (Cypress CY2081) but its data sheet doesn't specify any usage for audio - perhaps it is just being used for the FireWire-like interface? In any case, the CY2081 is an older chip, and has been superceded by what seems to be the superior and possibly pin-compatable CY22381. I am considering swapping this one in.
Could someone explain what this PLL chip is likely being used for, and what my DIY upgrade options might be? Thank you.