Re: Newbie: trying to log samples

• Subject: Re: Newbie: trying to log samples
• From: Michael Hanna <email@hidden>
• Date: Thu, 3 Feb 2005 13:49:04 -0500
• Delivered-to: email@hidden
• Delivered-to: email@hidden

On Feb 3, 2005, at 10:24 AM, Michael Hanna wrote:

Or if I printout the first 256 samples, I get 64 significant numbers and the rest zeroes. Why are there missing samples and why this 4:1 ratio of significant data to none?

The problem is because of:

<x-tad-smaller>#define SOUND_PRINTOUT_SIZE (2 * 128)</x-tad-smaller><x-tad-smaller>
</x-tad-smaller>

and:

<x-tad-smaller> memcpy (aSample, buffer->mData, SOUND_PRINTOUT_SIZE); </x-tad-smaller><x-tad-smaller>// grab 128 frames, 256 words</x-tad-smaller><x-tad-smaller>
</x-tad-smaller>

Your memcpy is only copying SOUND_PRINTOUT_SIZE _bytes_, whereas you seem to be expecting the buffer to contain SOUND_PRINTOUT_SIZE samples of data after the memcpy (since you are looping over the samples for that number of times)...

Does that help?

kelly

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