Sharing a PCM1794 between a DIR9001 and PCM2707 (i.e. DAC with both SP/DIF and USB) - diyAudio
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Old 21st March 2013, 10:44 AM   #1
JanErik is offline JanErik  Finland
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Default Sharing a PCM1794 between a DIR9001 and PCM2707 (i.e. DAC with both SP/DIF and USB)

Would that be possible and what would I need to take into consideration? Simply use resistors from I2S outputs on DIR9001 and PCM2707?
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Old 21st March 2013, 11:22 AM   #2
vzs is offline vzs  Europe
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You have to use a 2:1 digital multiplexer.

For this either use an IC like 74LVC157 (or similar) or 50Ohm impedance high frequency relay (Panasonic has many HF relays).

The first one is cheaper and you can buy it from twisted pair in a kit: OTTO-II 2:1 Switching Module - you probably don't need the u-fl connectors

Last edited by vzs; 21st March 2013 at 11:26 AM.
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Old 21st March 2013, 11:40 AM   #3
JanErik is offline JanErik  Finland
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Seems it needs to be selected manually?
Is it possible to make it switch automatically or even mix signals from both sources?
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Old 21st March 2013, 11:45 AM   #4
vzs is offline vzs  Europe
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Mix no way. Life is hard, you have to select manually.
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