Alcorn McBride Knowledge Base

There are two common causes for this problem. First, you may be playing your material at the wrong sample rate. Our test material contains audio with 44.1KHz sample rates. The DVM2 uses the lowest numbered file on the player to determine the default audio sample rate for playback. If your audio sample rate is 48KHz, you will need to rename one of your videos to be the lowest numbered clip on the drive. This will cause the unit to default to using a 48KHz audio sample rate. You can rename any of our test material to higher numbers without causing any problems. You can find out more information on encoding as well as power up functionality in the DVM2 manual. Some approved encoding services may be found in our listing of http://www.alcorn.com/library/text/encoding/index.html Encoding Services. You should also see another entry in this data base for changing the playback audio rate of the DVM2 via the serial port. Second, you could be playing your material at the wrong frame rate. If the material was encoded as NTSC (29.97 fps) and is played in PAL mode (25 fps), the output could look jerky. The same is true for the reverse: PAL played as NTSC. Make sure dip-switch number 2 on the rear panel of the unit is set to the correct position. On is for PAL, Off is for NTSC. The unit ships with the switch in the NTSC position. A full description of the dip switch settings for the DVM2 is available in the DVM2 manual.