The difference between 5.1 and 7.1 channels
5.1 and 7.1 are multiple channel audio formats.
5.1 has 6 channels and 7.1 has 8 channels.
left
right
center
low frequency effects
left
surround
right surround
The channels in 7.1 are
leftright
center
lower frequency effects
left surround
right surround
left rear surround
Right rear surround
Surround placements of speaker should be in particular angle from the listener in 5.1
the left channel is placed at -30 degreecenter channel is placed at 0 degree.
right channel is placed at 30 degree.
left surround channel is placed at minus 110 degree.
right sound channel is placed at 110 degree.
In 7.1
- left surround channel is placed at minus 90 degree
- right surround channel is placed at 90 degree
- left surround rear will be placed at minus 150 degree
- and right surround rear is placed at 150 degree
While exporting in Davinci resolve many had doubts about the differences between 5.1 film and 5.1. Not only in 5.1 case confusion also arises in 7.1 vs 7.1 film
In film 5.1 will be recorded in the order
- L c r Ls rs and Lfe for 5.1
- L c r Ls rs Lsr rsr lfe for 7.1
DTS 5.1 were given in compact disks in
- l r ls rs c and lfe orders
DTS 7.1 has two orders that is
- l c r ls rs lsr rsr lfe
- l r c lfe ls rs lsr and rsr
Dolby and SMPTE adapted the order
- l r c lfe ls rs for 5.1
- l r c lfe ls rs lsr rss for 7.1
Currently, we are using the SMPTE order.
For 7.1 there is another song format called SDDS which is totally different from general.
7.1 that is l lc c rc r ls rs lfe
rc is right center
You can see even the angles of speaker positions are different from regular dolby,dts,sdds .
All three can be encoded in one film print. If there is any issues in systems of dolby dds or sdds then the sound will get played from analog in film.
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