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fb74ab9054
Add 3 levels of volume limits. 1. Add api.acp.min-volume and api.acp.max-valume on the ACP devices that is applied to all noded from this device 2. Add api.acp.device.<node-name>.min-volume and api.acp.device.<node-name>.max-volume that is applied to all nodes from the device with the given node-name. 3. Add api.acp.port.<port-name>.min-volume and api.acp.port.<port-name>.max-volume that is applied to all ports from the device with the given port-name. The volume settings on an ALSA nodes can either go through the device on the Routes (ports) to control the hardware mixer volumes and then the remainder is performed on the nodes in software by the channel mixer. We need to set the limits on the channel mixer when the hardware mixer does not have routes. This is not an easy way to set the volume limits but it provides a static configuration option to enforce the limits. An easier configuration option will also make it easier to change/bypass the limits, which these options can guard against. See #5266, #4323, #1517 |
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