# Another Spectrogram **URL:** \ **Category:** Audio Plugins\ **Created:** [May 15, 2026, 1:01am UTC](https://forum.juce.com/t/another-spectrogram/68830 "2026-05-15T01:01:23Z")\ **Posts on this page:** 10\ **Page:** 1
**Author:** ![brown2rl](https://avatars.discourse-cdn.com/v4/letter/b/779978/32.png) [@brown2rl](https://forum.juce.com/u/brown2rl)\ **Post date:** [May 15, 2026, 1:01am UTC](https://forum.juce.com/t/another-spectrogram/68830/1 "2026-05-15T01:01:23Z")
I could use some help with my Spectrogram plugin. Everything builds fine, but it seems like the processor buffer has 0 samples after using it in audacity. Any ideas? ---
**Author:** ![icebreakeraudio](https://sea2.discourse-cdn.com/flex026/user_avatar/forum.juce.com/icebreakeraudio/32/10446_2.png) [@icebreakeraudio](https://forum.juce.com/u/icebreakeraudio)\ **Post date:** [May 15, 2026, 7:36am UTC](https://forum.juce.com/t/another-spectrogram/68830/2 "2026-05-15T07:36:30Z")
If the buffer in the plugins processBlock is always size 0, then something isn’t setup correctly with the host/system. If your spectrogram processor has a buffer of size 0, then there’s a bug somewhere in your code. I’d start with making sure the buffer from the processBlock is being passed to any additional processors correctly. Without any additional information, that’s the best I can give you. It’s very hard to debug with so little to work with. It’s kind of like saying “I need help finding a house, its somewhere in England, any ideas?” ---
**Author:** ![brown2rl](https://avatars.discourse-cdn.com/v4/letter/b/779978/32.png) [@brown2rl](https://forum.juce.com/u/brown2rl)\ **Post date:** [May 15, 2026, 1:39pm UTC](https://forum.juce.com/t/another-spectrogram/68830/3 "2026-05-15T13:39:52Z")
Thanks for the reply. It seems as though it is the buffer in the processBlock is size 0. I copied what was returned by getNumberofSamples function to a member variable in the Spectrogram class and displayed the value as text in the UI. ---
**Author:** ![ImJimmi](https://sea2.discourse-cdn.com/flex026/user_avatar/forum.juce.com/imjimmi/32/10843_2.png) [@ImJimmi](https://forum.juce.com/u/ImJimmi)\ **Post date:** [May 15, 2026, 2:39pm UTC](https://forum.juce.com/t/another-spectrogram/68830/4 "2026-05-15T14:39:38Z")
Have you tried other DAWs and/or the Standalone app? ---
**Author:** ![brown2rl](https://avatars.discourse-cdn.com/v4/letter/b/779978/32.png) [@brown2rl](https://forum.juce.com/u/brown2rl)\ **Post date:** [May 15, 2026, 3:06pm UTC](https://forum.juce.com/t/another-spectrogram/68830/5 "2026-05-15T15:06:05Z")
No other DAWs, standalone app shows the same thing (although standalone isn’t connected to an Audio source). ---
**Author:** ![ImJimmi](https://sea2.discourse-cdn.com/flex026/user_avatar/forum.juce.com/imjimmi/32/10843_2.png) [@ImJimmi](https://forum.juce.com/u/ImJimmi)\ **Post date:** [May 15, 2026, 3:13pm UTC](https://forum.juce.com/t/another-spectrogram/68830/6 "2026-05-15T15:13:55Z")
Maybe try it with the JUCE plugin host or a DAW like Reaper to see if you get the same. Also try running with a debugger and putting a breakpoint in the `processBlock()` to inspect the actual object passed in to rule out that it’s not just the label not updating properly. ---
**Author:** ![brown2rl](https://avatars.discourse-cdn.com/v4/letter/b/779978/32.png) [@brown2rl](https://forum.juce.com/u/brown2rl)\ **Post date:** [May 15, 2026, 3:58pm UTC](https://forum.juce.com/t/another-spectrogram/68830/7 "2026-05-15T15:58:01Z")
Good idea with the debugger. I tried that, and it looks like it’s updating, but with 0 samples. ---
**Author:** ![brown2rl](https://avatars.discourse-cdn.com/v4/letter/b/779978/32.png) [@brown2rl](https://forum.juce.com/u/brown2rl)\ **Post date:** [May 17, 2026, 3:14pm UTC](https://forum.juce.com/t/another-spectrogram/68830/8 "2026-05-17T15:14:38Z")
@ImJimmi Tried the audio plugin host and same issue occurred. ---
**Author:** ![brown2rl](https://avatars.discourse-cdn.com/v4/letter/b/779978/32.png) [@brown2rl](https://forum.juce.com/u/brown2rl)\ **Post date:** [May 17, 2026, 11:53pm UTC](https://forum.juce.com/t/another-spectrogram/68830/9 "2026-05-17T23:53:23Z")
@ImJimmi @icebreakeraudio I figured out that the plugin is somehow creating infinite channels, thus never being able to iterate through them. ---
**Author:** ![brown2rl](https://avatars.discourse-cdn.com/v4/letter/b/779978/32.png) [@brown2rl](https://forum.juce.com/u/brown2rl)\ **Post date:** [May 18, 2026, 1:05am UTC](https://forum.juce.com/t/another-spectrogram/68830/10 "2026-05-18T01:05:34Z")
Solved by restricting the number of busses to 1