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Hello everyone, to keep it short I need to know if my current md gear is suitable for the technical demands of bioacoustics analysis. Frog calls (my subject of study) are usually in the range of the 20 Hz - 20.000 Hz. I was offered a tape recorder but doing technical research I found it to have a frequency response of 250 Hz - 6.300 Hz. I've downloaded the service manual of my Sony MZ-R70 and its frequency response equals that of the suggested range (+/- 3 dB) HOWEVER, I would like to know what range of frequencies are being manipulated to achieve the 292 kbps compression of the atrac format. Some frogs call in ultrasound, mind you. thanks JD