Record in uncompressed format .wav, .flac or .aiff mono, 16bits or 24 bits, 44.1, 48, 88.2 or 96kHz. Stereo files are also accepted but only left channel will be used : better record in mono, the upload is quicker ! Lossless compressed files in flac are also accepted and will speed the upload. The recording must start 15sec or less before the voice announcing “start to record now”. After the end of the sounds sequence, you can cut anywhere but avoid to leave too long sec after (so that the file size keeps reasonable).