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More => Old Versions => JRiver Media Center 19 for Windows => Topic started by: dean70 on July 09, 2014, 09:52:05 pm

Title: Pop when switching between (some) sample rates
Post by: dean70 on July 09, 2014, 09:52:05 pm
There has been an ongoing issue for a while, where there is a "pop" in each channel (with multi channel, you can hear it cycle quickly around the channels) when starting playback with a different PCM sample rate than the previous playlist. Will only occur when starting from stopped state. If you switch albums whilst playing between the same tracks, it is okay.

The intensity can vary between a small pop, to a "firecracker" crack.

Originally, I thought it might have been a driver/sound card issue, but it is consistant between sound card, USB DAC and even a Tascam USB powered DAC on another PC used as a headphone amp.

I have experimented with the play silence at startup audio options, but it does not help.
Title: Re: Pop when switching between (some) sample rates
Post by: Matt on July 10, 2014, 08:51:05 am
I have experimented with the play silence at startup audio options, but it does not help.

This is really the only work around:
Options > Audio > Play silence at startup for hardware synchronization
Title: Re: Pop when switching between (some) sample rates
Post by: 6233638 on July 10, 2014, 09:44:58 am
It's possible that both devices have the same problem.
I don't get any pops or clicks when switching between PCM formats on my Benchmark DAC2 via USB.

I do get pops when switching to/from DSD though, which according to Benchmark is not supposed to happen.
Title: Re: Pop when switching between (some) sample rates
Post by: dean70 on July 19, 2014, 06:59:43 am
This was the culprit: Options > Audio > Play silence at startup for hardware synchronization. Setting this to none solved this issue on all 3 interfaces.
Title: Re: Pop when switching between (some) sample rates
Post by: 6233638 on July 19, 2014, 07:47:32 am
Well I would not have enabled it unless you required the setting to be on.
However it's very strange that this would cause the problem.
 
It seems like something which should be investigated.
Title: Re: Pop when switching between (some) sample rates
Post by: dean70 on July 20, 2014, 04:57:40 pm
spoke too soon - still get the occasional pop, but it seems to be less prominent.