What is "Compression" in the spectrogram tab? #826
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Hello, Could you explain what is compression in the "Spectrogram" tab? Thank you. |
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Replies: 4 comments 8 replies
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That's really weird. It's not there in Firefox or Safari but I see it in Google Chrome. Then, clicking on it seems to open the live feed audio for me, which I thought was behind the security wall. I'll be interested to follow this discussion to find out more! |
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That is pretty weird. Can you get any screenshots? |
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Sure. Safari: Firefox: Google Chrome: |
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Ah yep, you're right. I think what's happening is when you click "Compression," those browsers must not support it which causes the Javascript to crash. Which then reverts to the static spectrogram image rather than the live one. The fix would just be to disable the compression HTML element on non Chrome browsers. |
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Compression just means audio compression. It tries to "normalize" the sound so that the quiet and the loud sounds are closer together in terms of volume. It honestly doesn't seem to be that effective but I just left it in there as a proof of concept for how audio effects can be added to the spectrogram. |
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OK, thank you. I had the feeling that when I activate compression the sound seems louder. |
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After last nights updates when use the compression or slide the "level-bar" the sound-level doesn't change at all. I tested in Edge, Firefox and Chrome. I checked svardstens birdnet-pi which hasn't been updated in a while and it works as it should in my browsers. |
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Can confirm. @jaredb7 |
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Hmm, I'm not seeing that here all browsers Edge, Chrome, Firefox + Mobile Chrome are behaving. I have reset my git repo as most of my changes are in just so there no differences. Is there anything in the developer tools if you hit F12? Only difference would be that I'm using RTSP streams and I assume you're both using soundcard / mic input? |
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Yes it only happens using a soundcard and not RTSP stream. If you temporarily remove your RTSP streams you should see the error in console. |
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AH I see!, added a check to see if the control to change between RTSP streams exists before trying to add a event to it. Could you checkout #834 , this should fix our issue :) |
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The Spectorgram with slider and compression works fine again! |
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Compression just means audio compression. It tries to "normalize" the sound so that the quiet and the loud sounds are closer together in terms of volume. It honestly doesn't seem to be that effective but I just left it in there as a proof of concept for how audio effects can be added to the spectrogram.