Audio is also a consideration, especially when you VHS convert to DVD. Linear track or normal audio is standard on all VHS VCRs. The linear track uses stationary audio heads to record sound with traditional recording techniques. The process is identical to methods used by audio cassette recorders.
Higher-quality VCRs are also available with Hi-FI sound. As mentioned above, Hi-Fi requires extra heads that are mounted on the video head drum assembly. Hi-Fi VCRs produce sterero sound in excellent quality, particularly when converting video to DVD. Also note that on VHS machines, Hi-Fi may also be called high definition audio.
A good VCR is the most essential element to the playback picture – especially when making a VHS to DVD copy. If an excellent video picture is important to you, look for a VCR that contains an internal time-base corrector. An inernal, or "line" TBC, cleans a signal and improves the image reproduction. It can also help stabilize and track the image, but usually not as effectively as an external TBC.
But beyond that, VCRs that contain TBCs generally also have better heads and transport mechanisms than cheaper consumer VCRs. They therefore help in providing a more noise-free and clearer image, which is very important when transferring tapes to DVD.