Why yes, you can. For some download formats (everything other than WAV, AIFF, or FLAC), we’ll need to downsample your consummate originals to 44.1/48 KHz, but you already assumed that. If you plan on uploading a file with a higher sample rate, be sure to leave at least 0.5 dB of headroom to avoid undesirable clipping in the final transcoded formats.