Digital1955
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Sizzle, baby.
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Anyone have a Shure M97Xe with any of the Jico SAS they could plot?
I do understand wanting to standardize on a way of inverting the RIAA curve if a phono pre-amp that applied the curve was used, but remember that analog RIAA phono amps aren't perfect either, so....I just wanted to consolidate the info as the script is getting used by more and more people. I think that future adopters may well be likely to only have access to 44.1 rate recording. (I know a few people with that ART USB Phono Plus, for example.) I'd personally like to have confidence in other's measurements or else it's all just well-intentioned noise.
I just wanted to consolidate the info as the script is getting used by more and more people. I think that future adopters may well be likely to only have access to 44.1 rate recording. (I know a few people with that ART USB Phono Plus, for example.) I'd personally like to have confidence in other's measurements or else it's all just well-intentioned noise.
Confidence is really difficult.
We aren't splitting the atom here.
Don't forget different phono pre-amps have different responses.The problem is, there are variations of several db between different test records....
Then there are variations in some of the IRIAA curves... several more db
It is really difficult to get a truly trusted baseline!
Don't forget different phono pre-amps have different responses.
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Since my measurements are taken directly from cart to ADC without RIAA I guess they are the best then ... but still variations in tone arms, tracking forces, loading, etc. makes a lot of potential variations. Having said all of that there is still some amazing consistencies such as consistent small FR variations of the STR 100 test record.
Cart to ADC is great, but you need to make sure that you are well within the dynamic range of the ADC...Don't forget different phono pre-amps have different responses.
Since my measurements are taken directly from cart to ADC without RIAA I guess they are the best then ... but still variations in tone arms, tracking forces, loading, etc. makes a lot of potential variations. Having said all of that there is still some amazing consistencies such as consistent small FR variations of the STR 100 test record.
mostly RIAA bit any FR non linearity.You mean, just the RIAA part, Right?
I built a SUT followed by a balanced transmitter (designed to create the same load as a phono pre-amp) then balanced cables to an ADC. For RIAA I use FIR filters but I can capture the signal directly with Audacity.How does ^that^ work?
Given the preamp is providing the loading for the cart.... and the loading can have a massive impact on linearity (for high inductance cartridges), the boundary between preamp and cart is a bit fuzzy.... (!!)Preamps are generally linear.
Carts less so.
Given the preamp is providing the loading for the cart.... and the loading can have a massive impact on linearity (for high inductance cartridges), the boundary between preamp and cart is a bit fuzzy.... (!!)