SounDS is an app that is able to load and play sounds (raw format) directly from the SD card (no size limit). The good thing about it is that you can change the frequence of the sound at anytime, during the playing process, so you can make a sound play faster/slower depending on the original sound frequence! stereo/mono selection is also included, and the default is 11025 Hz / stereo. BInaries are attached to the post.
here's a screenshot:
P.S.: touching the area where the frequence is shown, you get a list of the most usual frequences