A basic law in digital signal processing is, that the maximum signal frequency, which can be recorded is equal to one half of the sampling frequency. There is a level meter and a clipping indication flag.ĭepending on the kind of signals to be analyzed, the sampling frequency of the sound card must be adapted. Use the recording facility of the Real time spectrograph to get maximum support for monitoring the recording level. Too low levels will waste the available dynamic range of the sound card and further analysis will be affected too. Too high levels will cause clipping and distorted recordings.

This is the same matter as the recording level adjustment on your tape recorder while recording from the microphone. Take care that the recording level of the audio input device is adjusted correctly. In case you are not using the default audio recording device selected from the Windows Control Panel, launch the SASLab software dialog box “File”/”Sound Card Settings…” and select here the desired “Active Sound Card”.Īt next you should start the recording by either the command “File”/”Recording” from the SASLab main window or by the command “Record”/”Start (input from soundcard)” from the Real-time spectrograph window (can be launched from the main window by “File”/”Real Time Spectrogram…” ). So please make sure that you are using the correct one.īesides the physical hardware connection described above you may have to make some adjustments from the Windows Control Panel (Control Panel > Hardware and Sound > Manage audio devices > Recording > Properties). A common sound card has usually three connectors: microphone, line-in and line-out/speaker. In case your recorder has a different line-out connector (cinch or XLR), an appropriate adapter is required. So you will probably need a cable with male 3.5mm jacks on both ends. The line-out of the tape recorder is some times also a 3.5mm jack. Sound cards usually have a 3.5mm input jack. This page is addressed to those, who are not familiar with soundcards.įor transferring sounds from the tape recorder into the PC you first need to connect the line-out jack of the recorder with the line-in jack of the sound card by an appropriate cable. How to transfer sounds from a tape recorder into the PC Bat echolocation and communication calls.Ultrasonic vocalizations in laboratory rats and mice.Common audio recording (50 Hz … 20 kHz).Counting and measuring USV’s in real-time.Recording and analyzing rat or mouse USV’s.Automatically measuring sound parameters.

Sound recorder for pc