ajinkya
Active Member
- Joined
- Oct 27, 2007
- Messages
- 506
- Points
- 43
Hi,
I'm trying to tune my system with Chesky's 5.1 Audio Sampler disc, which has inbuilt Dolby test tones to help calibrate the sound pressure levels (SPL) from each speaker to be around 75 dB. I'm sure all those who've tuned their systems are familiar with this procedure. I'm using the recommended RadioShack SPL meter with all settings done.
The setup:
I have my DVD player outputting to my AVR Ext In via 5.1 analog cables. In other words, the DVD is doing all the decoding; the AVR simply outputs to the relevant speakers. So I set all distances/delays and speaker volume levels on the DVD itself.
My only question is the following:
When I need to get 75dB on the SPL from all speakers, at what default volume level should I keep the AVR at? If I increase the volume, while keeping the speaker volume settings on the DVD player the same, the SPL goes up, as it should. So what reference does one use here? What is 75 dB measured against? I am lost as to what reference level all these tests measure against. Most web articles explaining the setup do not mention this so I'm looking to the forum members for help.
Thanks,
Ajinkya.
I'm trying to tune my system with Chesky's 5.1 Audio Sampler disc, which has inbuilt Dolby test tones to help calibrate the sound pressure levels (SPL) from each speaker to be around 75 dB. I'm sure all those who've tuned their systems are familiar with this procedure. I'm using the recommended RadioShack SPL meter with all settings done.
The setup:
I have my DVD player outputting to my AVR Ext In via 5.1 analog cables. In other words, the DVD is doing all the decoding; the AVR simply outputs to the relevant speakers. So I set all distances/delays and speaker volume levels on the DVD itself.
My only question is the following:
When I need to get 75dB on the SPL from all speakers, at what default volume level should I keep the AVR at? If I increase the volume, while keeping the speaker volume settings on the DVD player the same, the SPL goes up, as it should. So what reference does one use here? What is 75 dB measured against? I am lost as to what reference level all these tests measure against. Most web articles explaining the setup do not mention this so I'm looking to the forum members for help.
Thanks,
Ajinkya.