6 and 8 channel are from
https://www-mmsp.ece.mcgill.ca/Documents/AudioFormats/WAVE/Samples.html  


tenniscourt.wav
tuffbreak.wav
https://middleearmedia.com/web-audio-api-convolver-node/

Born Again.irs (a .wav format file, renamed to IRS impulse response so Android doesn't add it to media library)
https://forum.xda-developers.com/t/guide-modifying-viper4android-convolver-impulse-responses-irs.3717683/ 
https://drive.google.com/file/d/0B7ujzTEVERI_VUxGSk5xdTRPd2c/view?resourcekey=0-HGBBBM0jD9Us-Vx8cV-_mw