HISE Logo Forum
    • Categories
    • Register
    • Login

    HISE FX and delay compensation

    Scheduled Pinned Locked Moved General Questions
    51 Posts 9 Posters 3.0k Views
    Loading More Posts
    • Oldest to Newest
    • Newest to Oldest
    • Most Votes
    Reply
    • Reply as topic
    Log in to reply
    This topic has been deleted. Only users with topic management privileges can see it.
    • UD AUDIOU
      UD AUDIO
      last edited by UD AUDIO

      This post is deleted!
      1 Reply Last reply Reply Quote 0
      • Dan KorneffD
        Dan Korneff
        last edited by Dan Korneff

        I could use some suggestions on how to improve my approach to handling latency in my projects. I've currently been manually measuring latency and compensating for it based on which DSP nodes and oversampling are active. While this works well for static latency, I’m running into a challenge when I need to dynamically update the latency.
        Right now, I’m using:
        prepareToPlay() to get the initial latency with Engine.getLatencySamples()
        processBlock() to set latency using setLatencySamples()
        This works well for static latencies, but now that I’m introducing multiple oversampling filters, I need to adjust latency dynamically, depending on whether the user selects Linear-Phase or Minimum-Phase filtering. Since Linear-Phase filtering can add up to ~120 samples, I don’t want to set a fixed latency that high, as it would negatively impact real-time usage.
        I need a way to recalculate latency when the processing mode changes. For example, when switching between oversampling filters. The goal is to update latency based on active DSP modules.
        @Christoph-Hart or anyone else have suggestions on how to dynamically recalculate the latency?

        Dan Korneff - Producer / Mixer / Audio Nerd

        A 1 Reply Last reply Reply Quote 0
        • A
          aaronventure @Dan Korneff
          last edited by

          @Dan-Korneff can you measure the latency of your modules, put it in consts and make the call to set the new latency to report whenever the user changes any of the controls that affect it?

          Christoph HartC Dan KorneffD 2 Replies Last reply Reply Quote 0
          • Christoph HartC
            Christoph Hart @aaronventure
            last edited by

            I would not trust every host to support dynamic latency so I‘d definitely check this thoroughly.

            1 Reply Last reply Reply Quote 1
            • Dan KorneffD
              Dan Korneff @aaronventure
              last edited by

              @aaronventure said in HISE FX and delay compensation:

              @Dan-Korneff can you measure the latency of your modules, put it in consts and make the call to set the new latency to report whenever the user changes any of the controls that affect it?

              That's definitely plan B. I guess I need to use a global variable to get this data into scriptFX?

              Dan Korneff - Producer / Mixer / Audio Nerd

              A 1 Reply Last reply Reply Quote 0
              • A
                aaronventure @Dan Korneff
                last edited by

                @Dan-Korneff why do you need to get it into script fx in the first place?

                Dan KorneffD 1 Reply Last reply Reply Quote 0
                • Dan KorneffD
                  Dan Korneff @aaronventure
                  last edited by

                  @aaronventure scriptFX is the only place you can access the processBlock to call Engine.setLatencySamples()

                  Dan Korneff - Producer / Mixer / Audio Nerd

                  Christoph HartC A 2 Replies Last reply Reply Quote 0
                  • Christoph HartC
                    Christoph Hart @Dan Korneff
                    last edited by Christoph Hart

                    @Dan-Korneff Why do you need to access processBlock?

                    If you need the sample rate / block size for the calculation, attach a broadcaster to the processing specs.

                    Dan KorneffD 1 Reply Last reply Reply Quote 0
                    • A
                      aaronventure @Dan Korneff
                      last edited by

                      @Dan-Korneff I'm calling it from a control callback where sample offset is adjusted and it works just fine (in Reaper).

                      Dan KorneffD 1 Reply Last reply Reply Quote 0
                      • Dan KorneffD
                        Dan Korneff @Christoph Hart
                        last edited by

                        @Christoph-Hart I was just following your Latency Test repo

                        Screenshot 2025-01-31 082335.png

                        Dan Korneff - Producer / Mixer / Audio Nerd

                        1 Reply Last reply Reply Quote 0
                        • Dan KorneffD
                          Dan Korneff @aaronventure
                          last edited by

                          @aaronventure Damn... Just tested and it works like you said. Happy days!

                          Dan Korneff - Producer / Mixer / Audio Nerd

                          Christoph HartC 1 Reply Last reply Reply Quote 0
                          • Christoph HartC
                            Christoph Hart @Dan Korneff
                            last edited by

                            @Dan-Korneff ah the example might precede the broadcaster addition, so that‘s kind of outdated as a best practice but if it works…

                            1 Reply Last reply Reply Quote 0
                            • First post
                              Last post

                            30

                            Online

                            1.7k

                            Users

                            11.8k

                            Topics

                            103.0k

                            Posts