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VU meter code - possible error?
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<blockquote data-quote="ajs" data-source="post: 1224630" data-attributes="member: 68833"><p>[USER=10391]@hwahrmann[/USER]</p><p>Plz help <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /> I read the documentation and can not understand anything.</p><p>RMS Function in MP: <a href="https://github.com/MediaPortal/MediaPortal-1/blob/master/mediaportal/Core/MusicPlayer/BASS/BassAudioEngine.cs#L2213" target="_blank">MediaPortal-1/BassAudioEngine.cs at master · MediaPortal/MediaPortal-1 · GitHub</a></p><p>Used:</p><p>1. First: <strong>BASS_Mixer_ChannelGetLevel</strong> or <strong>BASS_WASAPI_GetLevel</strong>, both return values for Left, Right channel (Left - LowWord, Rigth - HiWord) and value by channel <strong>from 0 to 32768</strong>. <a href="https://github.com/MediaPortal/MediaPortal-1/blob/master/mediaportal/Core/MusicPlayer/BASS/BassAudioEngine.cs#L2232-L2242" target="_blank">MediaPortal-1/BassAudioEngine.cs at master · MediaPortal/MediaPortal-1 · GitHub</a></p><p></p><p>2. Then <strong>LevelToDB</strong>(peakL, 65535) - from un4seen forum <a href="http://www.un4seen.com/forum/?topic=4831.msg32212#msg32212" target="_blank">dB to BASS volume?</a> this function work as: <strong>20 * log10( level / maxLevel )</strong> and for <strong>32768</strong> return<strong> -6.020461</strong> and for <strong>1</strong> return <strong>-96.478175</strong>, for <strong>0</strong> return <strong>-infinity</strong></p><p>3. Then in <a href="https://github.com/MediaPortal/MediaPortal-1/blob/master/mediaportal/WindowPlugins/Common.GUIPlugins/Music/GUIMusicPlayingNow.cs#L723-L724" target="_blank">MediaPortal-1/GUIMusicPlayingNow.cs at master · MediaPortal/MediaPortal-1 · GitHub</a> both channel value Increase by an absolute value multiplied by 0.5 and start to coincide with values from <strong>< -15 (VU1.png)</strong> to <strong>>= 3 (VU15.png)</strong>. <a href="https://github.com/MediaPortal/MediaPortal-1/blob/master/mediaportal/WindowPlugins/Common.GUIPlugins/Music/GUIMusicPlayingNow.cs#L728-L788" target="_blank">MediaPortal-1/GUIMusicPlayingNow.cs at master · MediaPortal/MediaPortal-1 · GitHub</a></p><p>Ie:</p><p><strong>~Min: 1</strong> -> -96.478175 -> -96.478175+(96.478175*0.5) -> <strong>-48.239087</strong></p><p><strong><strong>Max: 32768</strong></strong> -> -6.020461 -> -6.020461+(6.020461*0.5) -> <strong>-3.010231</strong></p><p>and</p><p><strong>Min</strong> -48.239087 < -15 Then return <strong>VU1.png</strong></p><p><strong>Max</strong> -3.010231 < -2 Then return<strong> VU9.png </strong>but how about <strong>VU10..VU15</strong>? <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite3" alt=":(" title="Frown :(" loading="lazy" data-shortname=":(" /></p><p><strong></strong></p><p><strong>I did not calculate correctly? Or I did not understand the documentation correctly? Or do we still have a problem with displaying the level through the channels? Or we do not have a problem and then please tell me where I was wrong? <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite27" alt=":whistle:" title="Whistling :whistle:" loading="lazy" data-shortname=":whistle:" /><img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite29" alt=":coffee:" title="Coffee :coffee:" loading="lazy" data-shortname=":coffee:" /> </strong></p><p><strong></strong></p><p>Thankful in advance for the answer.</p></blockquote><p></p>
[QUOTE="ajs, post: 1224630, member: 68833"] [USER=10391]@hwahrmann[/USER] Plz help :) I read the documentation and can not understand anything. RMS Function in MP: [URL='https://github.com/MediaPortal/MediaPortal-1/blob/master/mediaportal/Core/MusicPlayer/BASS/BassAudioEngine.cs#L2213']MediaPortal-1/BassAudioEngine.cs at master · MediaPortal/MediaPortal-1 · GitHub[/URL] Used: 1. First: [B]BASS_Mixer_ChannelGetLevel[/B] or [B]BASS_WASAPI_GetLevel[/B], both return values for Left, Right channel (Left - LowWord, Rigth - HiWord) and value by channel [B]from 0 to 32768[/B]. [URL='https://github.com/MediaPortal/MediaPortal-1/blob/master/mediaportal/Core/MusicPlayer/BASS/BassAudioEngine.cs#L2232-L2242']MediaPortal-1/BassAudioEngine.cs at master · MediaPortal/MediaPortal-1 · GitHub[/URL] 2. Then [B]LevelToDB[/B](peakL, 65535) - from un4seen forum [URL='http://www.un4seen.com/forum/?topic=4831.msg32212#msg32212']dB to BASS volume?[/URL] this function work as: [B]20 * log10( level / maxLevel )[/B] and for [B]32768[/B] return[B] -6.020461[/B] and for [B]1[/B] return [B]-96.478175[/B], for [B]0[/B] return [B]-infinity[/B] 3. Then in [URL='https://github.com/MediaPortal/MediaPortal-1/blob/master/mediaportal/WindowPlugins/Common.GUIPlugins/Music/GUIMusicPlayingNow.cs#L723-L724']MediaPortal-1/GUIMusicPlayingNow.cs at master · MediaPortal/MediaPortal-1 · GitHub[/URL] both channel value Increase by an absolute value multiplied by 0.5 and start to coincide with values from [B]< -15 (VU1.png)[/B] to [B]>= 3 (VU15.png)[/B]. [URL='https://github.com/MediaPortal/MediaPortal-1/blob/master/mediaportal/WindowPlugins/Common.GUIPlugins/Music/GUIMusicPlayingNow.cs#L728-L788']MediaPortal-1/GUIMusicPlayingNow.cs at master · MediaPortal/MediaPortal-1 · GitHub[/URL] Ie: [B]~Min: 1[/B] -> -96.478175 -> -96.478175+(96.478175*0.5) -> [B]-48.239087 [B]Max: 32768[/B][/B] -> -6.020461 -> -6.020461+(6.020461*0.5) -> [B]-3.010231[/B] and [B]Min[/B] -48.239087 < -15 Then return [B]VU1.png Max[/B] -3.010231 < -2 Then return[B] VU9.png [/B]but how about [B]VU10..VU15[/B]? :( [B] I did not calculate correctly? Or I did not understand the documentation correctly? Or do we still have a problem with displaying the level through the channels? Or we do not have a problem and then please tell me where I was wrong? :whistle::coffee: [/B] Thankful in advance for the answer. [/QUOTE]
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