Is there a way to mix a continuous background track (e.g. white noise) with the music/radio that is being played by LMS/SB3? I currently run LMS 7.9.2 on a Raspberry Pi4 that powers an SB3 which feeds an audio system via the SB3's digital output. I'd also like to be able to play background noise continuously via the SB3, and independently play music/radio that is then mixed in with the background track. Is this possible? I would prefer to do this without additional hardware between the SB3 and amplifier.
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