dustbro
Well-known member
Hey guys!
I have an 8 channel preamp that i wanna add adat out to. Any advice on where to start?
I have an 8 channel preamp that i wanna add adat out to. Any advice on where to start?
dustbro said:Hey guys!
I have an 8 channel preamp that i wanna add adat out to. Any advice on where to start?
dustbro said:Hey guys!
I have an 8 channel preamp that i wanna add adat out to. Any advice on where to start?
mhelin said:For SMUX XMOS is the one to use. Another thing is why should we track at FS > 48 kHz anyway. Using higher FS (oversampling) is only good when mixing in the box, and good plugins can do oversampling internally.
metalb00b00 said:I knew I needed a FIFO because reading and writing the audio bits are on two different master clock speeds, but yea, even with one generated by Xilinx IP Core Generator I just couldn't get the damn thing to work. I had buffer over-runs and under-runs, etc. In the end it was too much of a headache.
Andy Peters said:Yeah, those FIFOs don't work.
I thought I had a complete ADAT transmit and receive path coded up, but I can't find it, or even the ADAT spec, on my computer. WEIRD.
mhelin said:On the other hand you can get a basic Altera FPGA board from China for less that $/EUR 15:
https://www.ebay.co.uk/itm/ALTERA-FPGA-Cyslonell-EP2C5T144-Minimum-System-Learning-Development-Board-AS/292042601272https://www.ebay.co.uk/itm/ALTERA-FPGA-Cyslonell-EP2C5T144-Minimum-System-Learning-Development-Board-AS/292042601272
I guess the configuration for splitting 96 kHz I2S or TDM stream into two (or eight in case of TDM) 48 kHz I2S streams could be easily run on CPLD or (Cypress) PSoC device if you used combination of Wavefront/CoolAudio chips and programmable logic.
Tubetec said:The Behringer ada8000 does Smux ,it locks to 96khz Wc input ,channel count is halved though.Ive never been able to test this out as the adat inputs I run it into dont handle smux. at all.
Tubetec said:The Behringer ada8000 does Smux ,it locks to 96khz Wc input ,channel count is halved though.Ive never been able to test this out as the adat inputs I run it into dont handle smux. at all.
metalb00b00 said:EDIT:
Looking at the ADA8000 digital I/O schematic, the ADAT receiver chip has all the user bits output pin floating, and the transmitter chip has all of them tied to ground.
Therefore, the SMUX flag is never carried from the receiver side to the transmitter side. It remains false permanently the entire time the unit is on.
The ADC chips are only capable of 32kHz, 44.1kHz and 48kHz sample rates. All of them hardwired to the mic/line channels.
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