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lsusb -vshows exact same output.ATTR{id}isCODECandCODEC_1respectively, so that's probably just assigned as they connect. Maybe theATTR{devpath}will be consistent, assuming I keep them in the same USB ports? Unfortunately I can't get it to work. Yes, the binary is called, but the symlink is not created (NAME=is deprecated, so I usedSYMLINK+=). But putting that to one side, if I create the symlink it'll show up inaplay -las 10. But how do I create a PulseAudio device from that? Via/etc/asound.conf?ENV{ID_ID}to something distinguishable, which should automatically be passed to PulseAudio to become part of the PulseAudio device name. Just make sure your rule executes after the standard ENV{ID_ID} rules for your distribution, so the standard rules won't override your custom setting.KERNEL=="pcmC[D0-9cp]*", DRIVERS=="usb", PROGRAM="/usr/bin/alsa_name.pl %k", SYMLINK+="snd/%c",ENV{ID_ID}="%c"? The script does print out "pcmC9D0p" to stdout for my example device. But I don't see that string inpacmd dump.snd/%cit's actually created directly in/dev/, not in/dev/snd/.