Slow rendering waveform on Windows version

Bug Reports
1

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  • Device model (e.g. 2020 iPad Air 4th Gen): Intel i7-14700F with 32GB & NVMe SSD
  • Version of operating system (e.g. macOS 14.4.1): Windows 11
  • Version of djay (e.g. 5.1.2): 5.6.6
  • Hardware/controllers used (e.g. Reloop Mixon 8 Pro): Rane Seventy
  • Hardware firmware version (e.g. 1.0.1):
  • Please consider sharing a short video or screenshots to help clarify your issue

A) SUMMARY OF ISSUE:

  • From time to time when changing cue points the waveform shows empty space before the last pressed cue point for a few seconds before reappering. It is only visual because the audio is instant but it is confusing as it looks like I jumped to the beginning of the song. Also when using Instand Double it will take about a second before the song is duplicated. In both Serato and Traktor everything works instantly without any delay so it looks like some optimization issue in DJay.
3

Hi @Scratch-E_Con, welcome to the Community! Thanks for the setup details and issue explanation. Let’s focus on the blank waveform issue for now. I have some follow up questions for you to help isolate the issue.

  1. Please share your exact Windows 11 build (Settings > System > About, e.g. 24H2 / 26100.xxxx)
  2. What Rane Seventy firmware version # are you running?
  3. GPU model and driver version?
  4. Does it happen with the Rane Seventy disconnected, using only mouse and keyboard?
  5. Was this present in earlier djay versions? If so, which version was last known good?
  6. Does it happen with local files, streaming tracks, or both? If streaming, which service, and does it reproduce with a different service?
  7. Does it happen with all tracks or only certain ones? Any pattern by file format, bitrate, duration, or source folder?
  8. Are you using the (built-in) MIDI mapping or a custom mapping for the RANE Seventy.
  9. Have the Audio Device Settings been changed from default? Does increasing the buffer size change anything?

Please also provide the following:

  1. A short screen recording of the waveform blanking, showing several cue point presses, including at least one failure and one normal press for comparison.
  2. If possible, a recording with Task Manager visible alongside djay while the blank waveform issue is happening.
  3. Screenshot of djay Settings > Audio Device.
4
  1. Please share your exact Windows 11 build (Settings > System > About, e.g. 24H2 / 26100.xxxx): 10.0.26200 build 26200
  2. What Rane Seventy firmware version # are you running? v 1.0.3
  3. GPU model and driver version? Intel ARC A380
  4. Does it happen with the Rane Seventy disconnected, using only mouse and keyboard? Yes the same behaviour when using DJay Pro in Internal mode without using the mixer and DVS
  5. Was this present in earlier djay versions? If so, which version was last known good? I don’t know, I am a new user since 2 weeks
  6. Does it happen with local files, streaming tracks, or both? If streaming, which service, and does it reproduce with a different service? Both with local and streaming files (Spotify)
  7. Does it happen with all tracks or only certain ones? Any pattern by file format, bitrate, duration, or source folder? All files regardless of bitrate or file type
  8. Are you using the (built-in) MIDI mapping or a custom mapping for the RANE Seventy. Both
  9. Have the Audio Device Settings been changed from default? Does increasing the buffer size change anything? Audio buffer size was at 64 frames. I increased to the max 2048 but the same behaviour
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7

Thanks for answering my questions and sharing those screenshots @Scratch-E_Con - this is very helpful information! I have a few more follow ups before I share this with our engineering team to see if they can produce the issue:

  1. Can you please capture and share a short 30-60 second screen recording showing several cue presses including at least one failure and one normal press, ideally with Task Manager or an overlay showing CPU and GPU usage?
  2. Roughly how many cue presses out of ten show the blank waveform?
  3. Does this happen on a short track, for example three to five minutes, at an early playhead position?
  4. Does it happen on Deck 2 as well as Deck 1, and does it ever affect both decks at once?
  5. Does the Instant Double delay persist in Internal mode with no hardware connected, and with the maximum buffer?
  6. Does the waveform zoom level change the behavior?

Thanks again for you help!

8

  1. see attached video. This was taken with Serato control vinyl (REL) but same behaviour when using Phase (WIR) or in Internal mode.

  2. 80-90% of the time

  3. Filesize or song length does not matter

  4. Both decks

  5. Instant double delay is almost non existent in internal mode. But it is slower when using DVS (REL) or Phase (WIR). Changing buffer size makes no difference.

  6. Changing zoom level makes no difference. High/low contrast also makes no difference.

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9

Thanks again @Scratch-E_Con, this is exactly what I need to escalate this issue to our engineering team for further review. I’ll report back here when I hear back from engineering. They may require additional data from you, but I’ll let you know either way.

11

Hi, were you able to reproduce the issue?

12

Hi @Scratch-E_Con, thanks for checking in. Our engineering team has not reproduced this issue yet. I’ll share more news here when I have it.

13

Hi @Slak_Jaw some more info on the poor performance when using ‘instant double’: it is very slow when duplicating large (400 MB) .wav files. Yet still in both Traktor and Serato these files are ‘doubled instantly’ so my guess it is a software optimization issue. Also I am using high speed NVMe SSD’s so read/write should not be the problem.

Hope this helps.

15

Thanks for the additional info @Scratch-E_Con. I will pass this onto engineering for reference. In the meantime, they were able to reproduce this issue on their setups and are investigating further. I’ll share more news here when I have it. Thanks!