What frequency range are video & music signals in?

The audio is in the ... audio .. range, that is, 20Hz to 20kHz

An ordinary composite signal is in the range of 0 to 4 MHz. See the reference for more detail.

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Video Frequency

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Well honestly your best option is to run your subwoofer off the main outputs (using a y connector for the right and left main outputs, so that you have a mono signal) as this will send a full range signal to the subwoofer allowing you to use the subwoofers high pass adjustment to properly blend with the main speakers. Normally you would need a test disc and VU meter to set the cross-over correctly but you can get pretty close by ear. You can play some music with good bass information and play with the high pass till the bass sounds clear and detailed. If the bass sounds muddy the high pass is set to high as both the main speakers and the subwoofer are reproducing the same frequency's which makes it sound thick or muddy sounding, loosing bass detail. To low a setting the bass will sound lean and will miss detail in the upper bass region. The correct setting should be somewhere around the 3/4 mark on the high pass setting. Otherwise if that sounds to difficult to do then use the subwoofer output and set it to 150hz or try the 100hz setting but no others, as they are to low a setting. The150hz setting may sound as I mentioned above a little muddy or thick in the upper bass region. The 100hz setting there will be a slight gap between the subwoofer and the main speakers which may make the bass sound alittle lean. Good luck Kevin 35 years hi-end audio video specialist

frequency range video music signals

the A/V signals from VHS is a subset of NTSC broadcast standards. The video is a composite (thats why its called composite) of sync pulses, luminence video levels and a color subcarrier modulated at 3.58 Mhz. if you put an analyser on this the predominate peak would be the at the frequency of the H-sync pulse (15 khz). The V-sync would be weaker at 60 Hz. Video would appear as energy peaks at 15 kHz intervals up to 4.2 MHz for television video, or 3.2 MHz for VHS. VHS limits the video bandwidth to 3.2 MHz so it does not have to worry about interleave with chroma subcarrier at 3.58 MHz. The interleave is why S-VHS uses the S-video connector. It puts 4.5 MHz luma only on the y connection and 3.58 MHz chroma on the c connection.

In either case VHS or SVHS, the chroma is recorded as a 622 kHz carrier on tape, then upconvered on playback to be quasi compatible with NTSC composite. Since the video luma energy peaks at multiples of the H-sync frequency that leaves "dead" space in the spectruum between peaks. Into this space the chroma information is interleaved. The chroma 3.58 MHz carrier is precisely controlled so that its modulation energy peaks occur at the odd half multiples of H-sync. This region of interleave occurs starting at 1.5 MHz and continues to 4.2 MHz. This is not symetrical about the 3.58 carrier intentionally. There are really 2 chroma data channels, put on the LSB and USB of the burst frequency. The quadrature modulation axis is selected so the higher bandwidth channel (LSB) carries detail that corresponds to flesh tone where the eye's chroma acquity is highest, and the lesser channel (USB) carries the blue complimentary hue (refered to as I and Q in engineering texts). Thus a broadcast NTSC signal has about 2 MHz I bandwidth and 1 MHz Q, but in VHS both I and Q are limited to 622 KHz, which is why color really sucks on VHS.

All of this is rapidly becoming obsolete when both audio and video become cummunicated as compressed digital bit streams.