![ds happy box for mac ds happy box for mac](https://i.imgur.com/e5AhMJn.jpg)
![ds happy box for mac ds happy box for mac](http://www.nds9.com/img/instructions/image003.jpg)
![ds happy box for mac ds happy box for mac](https://i.ytimg.com/vi/Q32OtijdJnM/hqdefault.jpg)
In other words, for a recording period of 2 hours and 40 minutes, this recording occupies around 170 MB (megabytes). Although it allows me to record for a longer period of time in extra high quality, one must be aware that in this quality the recorder would use more memory. The reason I bought the 512MB version of thi s recorder was that I wanted to record the speakers voice in extra high quality which would last at most 8 hours. This recorder has a digital flash memory of 512 MB, which allows to record sounds in extra high quality for 8 hours and so (see manual). The recorder can also do a fast playback, but I just don't see the point of this function. This digital recorder has the capability to slow down playback speed in order to listen to proper pronounciation of words from the speaker. Whether the voice is recorded using Stereo or Mono, the produced sound quality is surprisingly good even though a lesser chosen quality is used to record sounds. It's sensitivity to the recorded voice gives an impression to a listener as if the speaker is actually speaking right on the recorder's mic. The Olympus DS 40 digital voice recorder is an excellent recorder.