Thats possible? Or do you really need to make them yourself? 
Use Audacity, open .mp3, select 11025 Hz as project rate (left bottom corner). Export as raw unsigned 8-bit PCM
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Thats possible? Or do you really need to make them yourself?
Use Audacity, open .mp3, select 11025 Hz as project rate (left bottom corner). Export as raw unsigned 8-bit PCM