In response to [this tweet](https://twitter.com/azonenberg/status/1381291978696978434?s=20): SPDIF scope capture at the pins of an TOSLINK receiver of a 1kHz audio test signal. [spdif_1khz_2M.csv.gz](https://github.com/azonenberg/scopehal-apps/files/6337627/spdif_1khz_2M.csv.gz)