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POwaveOutPrepareHeader returns INVALPARAMS
 

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    <p>I've been trying to track this down for a while but I'm at a loss as to where to look next. Whenever I call waveOutPrepareHeader() I get INVALPARAMS indicating "The buffer's base address is not aligned with the sample size." </p> <p>I am currently preparing my header from the data after the "data" tag (and length) from the file using the method found via MSDN.</p> <pre><code> public Wave.SystemError Read(BinaryReader rdr, uint readLength) { dwBufferLength = readLength; byte[] data = new byte[readLength]; rdr.Read(data, 0, data.Length); if (lpData == IntPtr.Zero) lpData = Memory.LocalAlloc(Memory.LMEM_FIXED, (uint)data.Length); if (lpData == IntPtr.Zero) return Wave.SystemError.NOMEM; Marshal.Copy(data, 0, lpData, data.Length); return Wave.SystemError.NOERROR; } </code></pre> <p>All the parameters of the class are zeroed out before use, after calling this function on a wave file I get</p> <pre><code>dwBufferLength = 32768 dwBytesRecorded = 0 dwFlags = 0 dwLoops = 0 dwUser = 0 lpData = 384656 lpNext = 0 reserved = 0 </code></pre> <p>when passed into </p> <pre><code>return waveOutPrepareHeader(hWaveOut, ref headerBuffer[buffIndex], (uint)Marshal.SizeOf(headerBuffer[buffIndex])); </code></pre> <p>where headerBuffer[buffIndex] is the abovementioned WAVEHDR I get 11 (MMSYSERR_INVALPARAM). I've checked and my hWaveOut and size seems to be sane so I'm forced to conclude the problem is with the header but I can't figure out what is wrong or even what to check. </p> <p>What do I need to do to fix this error, or failing that, what can I check to see what is causing it? Any assistance would be greatly appreciated</p>
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    1. COCan you point to some documentation for `WavePrepareHeader`? All i could find was `WaveInPrepareHeader`
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    2. COOh, that is a PInvoke to waveOutPrepareHeader. I'll edit my question to make this more clear. Documentation for that is here http://msdn.microsoft.com/en-us/library/aa908929.aspx
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    3. CONew piece of info. I tried porting this code over to non-CE to see if there would be any difference, and the same code (other than swaps of the dlls the PInvokes are pointing to) got past waveOutPrepareHeader without returning any error. Not sure what this means for what the issue is but it seems pertinent
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