6/9/2023 0 Comments Ardour 5.12 recording|_ Port 7: Dev 8, If 4, Class=Audio, Driver=snd-usb-audio, 480M ![]() |_ Port 7: Dev 8, If 3, Class=Audio, Driver=snd-usb-audio, 480M |_ Port 7: Dev 8, If 2, Class=Audio, Driver=snd-usb-audio, 480M |_ Port 7: Dev 8, If 1, Class=Audio, Driver=snd-usb-audio, 480M |_ Port 7: Dev 8, If 0, Class=(Defined at Interface level), Driver=, 480M The tree of the SQ-5 USB layout looks like this: CPU usage is low, and locking the CPU frequency governor to the chip’s max rated clock-rate have no effect. The PC in question runs Ubuntu 17.10, although I’ve experienced this same issue on my laptop with Ubuntu 16.04 as well (there using both USB 2 & USB 3 ports.) I’ve attached the detailed lsusb output for the SQ-5 as well, if it’s of any use if additional information would help, feel free to inquire. This accurately reflects what I hear when monitoring the input channel directly from the mixer as well. The attached file was recorded by mapping the USB input channel to an Aux send routed as a mix back out the USB interface and recording it into another track in Ardour. The issue can be heard at 5-8 seconds, and again at 13-18 seconds into the file. I am running the latest firmware on the mixer, 1.2.2. ![]() The majority of the time the audio is clean, but I’ll get the distortions that seem to be described for the Qu-series on the audio sent from the PC into the SQ-5. The attached ogg mp3 file shows the result I have when connecting a PC application (Ardour 5.12.0) to the SQ-5 over the USB-B protocol. I saw the sticky for the Qu-series digital noise topic, but didn’t see an indication that this applied to the SQ-series as well, hence the separate topic. ![]() (2nd attempt to post as the edit appeared to leave the thread completely blank.)
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