`passthru` on Daisy Seed produces a loud tone

[GregoryTravis]

blinky works fine. passthru doesn't pass audio through, but just produces a tone. I'm a total beginner with embedded programming, but it sounds like it produced one buffer of data and it's just looping that.

I don't know how to receive the log data, so I don't know if something is going wrong internally.

I don't know the revision of the Daisy Seed, but I get this from dfu-utils:

Found DFU: [0483:df11] ver=0200, devnum=1, cfg=1, intf=0, path="1-1", alt=1, name="@Option Bytes   /0x5200201C/01*128 e", serial="200364500000"
Found DFU: [0483:df11] ver=0200, devnum=1, cfg=1, intf=0, path="1-1", alt=0, name="@Internal Flash   /0x08000000/16*128Kg", serial="200364500000"