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MediaPortal 1
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Mini Display
Zalman HD135 VFD (VlSys Mplay)
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<blockquote data-quote="cybrmage" data-source="post: 230359" data-attributes="member: 51680"><p>Good... That is the intended behaviour (if you have selected the "blank display" option...)</p><p></p><p></p><p>Thanks. I'll look at the logs and see what I can find.</p><p></p><p></p><p>hmm... that shouldn't be happening... Can you check with todays version and see if it's still doing that...</p><p></p><p></p><p>The Equalizer display requires FFT processing to extract the frequency spectrum... The Bass audio engine provides the FFT data as an representation of ALL channels over 1024 frequency points in the Audio spectrum... To display this data, we divide the 1024 frequency into 16 bands and average the FFT values.</p><p>The VU Meter requires the FFT data of each individual channel... The Bass audio engine will provide the FFT data for individual channels but, from what I've been able to determine, the data returned doesn't seem to correspond to the audio heard. To display the VU Meter, we take the maximum value of all ranges for each channel.</p><p></p><p>I suppose that the VU Meter display could also be derived from the raw sample data for each channel, but that would make the processing more involved. (The Bass documentation indicates that the sample data reflects the state of the audio playback buffer at the time of the call to the Bass library (and returns a variable sized data array), whereas the FFT data is windowed (and will always return a fixed size data array)...</p><p></p><p>Check out todays version of the driver...</p><p></p><p></p><p>Regards,</p><p>CybrMage</p></blockquote><p></p>
[QUOTE="cybrmage, post: 230359, member: 51680"] Good... That is the intended behaviour (if you have selected the "blank display" option...) Thanks. I'll look at the logs and see what I can find. hmm... that shouldn't be happening... Can you check with todays version and see if it's still doing that... The Equalizer display requires FFT processing to extract the frequency spectrum... The Bass audio engine provides the FFT data as an representation of ALL channels over 1024 frequency points in the Audio spectrum... To display this data, we divide the 1024 frequency into 16 bands and average the FFT values. The VU Meter requires the FFT data of each individual channel... The Bass audio engine will provide the FFT data for individual channels but, from what I've been able to determine, the data returned doesn't seem to correspond to the audio heard. To display the VU Meter, we take the maximum value of all ranges for each channel. I suppose that the VU Meter display could also be derived from the raw sample data for each channel, but that would make the processing more involved. (The Bass documentation indicates that the sample data reflects the state of the audio playback buffer at the time of the call to the Bass library (and returns a variable sized data array), whereas the FFT data is windowed (and will always return a fixed size data array)... Check out todays version of the driver... Regards, CybrMage [/QUOTE]
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Zalman HD135 VFD (VlSys Mplay)
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