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Your original file is 45 MB is size, that's huge!
Duration: 00:02:02.55, bitrate: 3072 kb/s
Stream #0:0: Audio: pcm_f32le ([3][0][0][0] / 0x0003), 48000 Hz, 2 channels, flt, 3072 kb/s
My file is 2 MB
Duration: 00:02:02.58, start: 0.000000, bitrate: 130 kb/s
Stream #0:0(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)