Steven Engelbert

Update NPM packages and validate that the frontend doesn't need any version pinning Update release.md to include NPM upgrade step

Add volume sync between Spotify and AmpliPi

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### What does this change intend to accomplish? Make it so that Spotify side volume changes are reflected in AmpliPi and vice-versa ### Checklist * [x] Have you tested your...

Volume Delta Expansion

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### What does this change intend to accomplish? This PR aims to preserve the relative distance between zone volume levels when they would otherwise exceed the min or max vol_f...

Synchronize airplay volume

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### What does this change intend to accomplish? Does the same as #1063, but for airplay Airplay does not allow outside sources change the volume of the airplay host, so...

Sync airplay and amplipi volumes

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This is a copy of #337, intentionally made as to not spam those that are in that thread as I document my findings In #1063 I've implemented a volume synchronization...

### What does this change intend to accomplish? I've pressed a new 0.4.8 image so we can stop sending people back to 0.3.1 when they have an otherwise irrecoverable issue,...

Vsrc values drift on system reboot

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When you use a stream that uses a `vsrc` value, it will go to one of the sources in `[v0, v1, v2, v3]`. If you leave one such stream open...

Add min/max volume buffers

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When you change the volume of a group from 50 to 75, that is processed as adding 25 to the volume of all underlying zones. However, if you have say...

Spotify-side volume changes are not realized

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Previously when we were running [spotifyd](https://github.com/Spotifyd/spotifyd), Spotify volume controls functioned spotifyd decayed over time so we swapped to [go-librespot](https://github.com/devgianlu/go-librespot), which does support volume changes but they sound notably worse than...

When nothing is connected to a Spotify connect stream, it reports the status as "Playing" when it should be "Stopped"