This is most likely a result of selecting a stereo input for your track but only recording a mono source. If you do this, you will only record to one channel of a stereo track and it will only come out of one speaker. Make sure you are selecting the proper input for your audio track. For example, if your audio interface has two inputs, the inputs that will most likely show up in your Cakewalk program as:

- Left Input 1-2
- Right Input 1-2
- Stereo Input 1-2

If you are plugging into input 1 on your device, choose "Left Input 1-2". If you are plugging into input 2, choose "Right Input 1-2". If you are plugging into both, then choose "Stereo Input 1-2".

If your track was previously recorded as a stereo track and only has signal on one channel, you will be able to tell visually because only one half (top or bottom) will show waveform. If this is the case, you can convert it to a mono audio file by right-clicking on the clip and selecting "Convert to Mono".

For a more in-depth explanation, please click here.