Bird Identification

Is there a way to upload audio files for help identifying a bird by song? I have two clips of a bird that starts with a lower note, then a pair of middle notes, followed by a higher trill. Suspects include the song sparrow or field sparrow. I hear it a lot, but have been unable to view the bird singing, so I am unsure of its identity. The sound doesn't match any of the ebirds sound files for either of these birds. Thx.