The playback from the sound driver does not provide the expected sound. To make this easier to hear add a sine wave generator to the sound driver and add a configuration symbol to select it.
This series is on top of [PATCH 1/1] test: test sandbox sound driver more rigorously https://lists.denx.de/pipermail/u-boot/2022-December/501266.html Heinrich Schuchardt (3): sound: function to generate sine wave sound: add CONFIG_SOUND_SINE symbol sandbox: fix sound driver arch/sandbox/cpu/sdl.c | 11 +++++----- drivers/sound/Kconfig | 6 ++++++ drivers/sound/sound-uclass.c | 10 +++++++-- drivers/sound/sound.c | 39 ++++++++++++++++++++++++++++++++++++ include/sound.h | 12 +++++++++++ 5 files changed, 70 insertions(+), 8 deletions(-) -- 2.37.2