Delay missing?

[Vectrobe]

Delay nolonger appears to be present, LSP is installed however...

[wwmm]

At the time it was removed its license was not friendly to open source projects. Now things have changed and lsp is fully opensource. I am still considering if I bring it back or not. With the stereo tools plugin we can add a delay between the channels. So at least for my needs it is enough. Do you need to apply different delays for each channel?

[Vectrobe]

In my case I simply wanted an easily-toggled flat delay of about 2 seconds to counter a sync issue in a particular youtube video. I have no idea if stereo-tools can do that due to #208 ...

[wwmm]

Stereo tools only adds a delay between the two channels but not a specified delay to both of them as far as I remember.

[Vectrobe]

was there a specific requirement for LSP here? or could we use calf?

[wwmm]

As far as I remember Calf does not have an equivalent plugin

[jrudess]

@paul17041993 Not to imply that this enhancement isn't a good idea, but you can also counter sync issues in youtube audio by using streamlink to view youtube videos in mpv, and then mpv can apply an audio delay (ctrl +, ctrl -)

[unlxg]

For my part, I was planning to use PulseEffects especially for this delay. Too bad...
My use case is ->
I use a HTPC, connected to a Sony kd55XF9005 for the display, and an external amplifier for the audio.
Unfortunately, this TV has an input lag of ~100ms. So, to recover the lip-sync, I need to delay the sound by around 100ms as well.
Luckily (at least for me), on my PC, PulseEffects introduces a latency high enough for the desync to drop under a value not noticeable anymore by my brain.
Therefore I am currently using PulseEffects w/o any effect and it is ok so far. But this is a dirty solution.
Note that PulseEffect was my fourth attempt to implement this delay.
I tried

• PavuControl, but it can delay the video only, not the audio.
• The loopback module of PulseAudio, but I cannot set the right source. Only the output monitor is available.
• a ladspa delay plugin for PulseAudio, but no way to initialize it. Failing whatever I try.
• Then PulseEffects, the delay was removed...

[wwmm]

Ok. I think we have enough use cases to justify the reintroduction of the delay plugin. With lucky I will do this in the next days. As this plugin does not have many controls it shouldn't take long

[wwmm]

The delay plugin is back in version 4.4.7

[unlxg]

I just tried this new version, but have some troubles using it.

• I had to reset the parameters, as the delay master switch was greyed out.
• Then, it looks like switching on this effect does not actually start it : there is no delay, the vu meters stay still, the gain sliders do nothing.
• Whenever I touch the delay effect, at next reboot I have the message: "Pulseeffects was updated, do you want to reset its parameters"
• I tried the equalizer, to somewhat rule out an issue on my installation, and none of previous behaviors appear: its effect is noticeable immediately, the vu meters and gain sliders are working.
• I tried all that playing a youtube video on Firefox.
• My distribution is Linux Mint Mate 19.1
  Hope this helps.

[wwmm]

Do you have the package with Linux Studio plugins installed? The delay plugin is not built-in in PulseEffects. The output of this command gst-inspect-1.0 | grep -i lsp should have lsp plugins

[unlxg]

Right.
There were plenty of plugins in my /usr/lib/lv2 directory, but not the lsp.
Now that I installed them, the delay is working fine and all other glitches disappeared as well.
Thanks.