dMAX bandwidth limit?

Jaehoon Heo

I have been trying to use dMAX for 8-ch input/16-ch output configuration, and having a seemingly dMAX bandwidth issue with 192kHz input. I can use 8-ch 192kHz input/8-ch 192kHz output, adding 8-ch 48kHz output into the mix breaks the audio I/O. 48kHz output is synchronous to 192kHz I/O clock. Is this an expected behavior due to the dMAX bandwidth limit?

over 14 years ago

0 dabuan over 14 years ago

TI__Genius 14545 points

Jaehoon,

Which device are you using?

0 Jaehoon Heo over 14 years ago in reply to dabuan

Prodigy 80 points

Sorry for forgetting the device name. It's C6727.

0 dabuan over 14 years ago in reply to Jaehoon Heo

TI__Genius 14545 points

Jaehoon,

We're looking into this. In the mean time have you seen the optimization section in the dMAX User Guide?

0 Brad Griffis over 14 years ago in reply to dabuan

TI__Guru*** 125430 points

How have you configured the "quantum"? If it's small try making it larger. Also, are you utilizing the intialization patch for the ROM code? It is related to dMAX.

0 Lester Longley over 14 years ago in reply to Brad Griffis

TI__Intellectual 1530 points

Jaehoon - I don't believe we've ever achieved that high of an I/O rate on DA7xx systems, but of course it will depend on how external memory is involved and other factors. I don't mean to imply that it's not possible, but rather that we haven't supported this config in multi-channel decoder based systems. -Lester

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dMAX bandwidth limit?