As you can see, it’s quite higher than the theoric one (6.88 ms), probably because the 2 x 0.54ms latency for the AudioInjector soundcard is too low. Also, probably i’m ignoring some delay in the I2S bus and the kernel itself. I’m not an expert, so any contribution to this discussion will be very welcome!!
Anyway, i don’t trust completely the BitScope, so i will try to repeat the measure with a decent DSO, probably this week
I’ve recorded a little audio demo with my electro-kalimba and the Zynthian Box with Audio-Input:
I’ve used the MOD-UI patch shown in the main post in this topic. Sorry for the tempo/sinchro pitfalls. It’s my first time using a looper and i hadn’t got a foot-switch, so i had to switch the super-lopper by hand, rotating the zynthian controllers …
The recording itself was also done with the Zynthian Box, using the “jack_rec” tool from the command line. I will include a simple recorder utility in the admin menu to ease this task.
What is the wiring conf I’ve to set if I want to use the pi tft 2"8 and this audiocard ?
I don’t know if it’s related, but the touch functionnality is not working on my config with this two hats. Screen is working good (except the light of the screen which goes down after the welcome screen Zynthian) but no touchscreen functionnality.
(Screen is not detected as a touch device, no entry in /dev/input/)
Could you send some more detailed photo of the display? And the exact model name … please!
Anyway, it seems that this is not the “normal” PiTFT 2.8" we normally use for Zynthian
It shouldn’t be needed to install the Adafruit kernel. Doing so can break something, specially MIDI input.
Probably your display is already supported by standard kernels, but you have to load the corresponding layout in the /boot/config.txt. Sometimes you have to copy a specific layout file from the manufacturer (Adafruit).
Also, you should have to adjust the touch calibration. If you do so, you can give feedback, so we can add your display to the webconf tool.
Regarding MIDI sync … currently it’s not implemented in Zynthian, or to be more exact, AFAIK any of the sound engines integrated in Zynthian currently support it ;-(