Roger,
This is not true; this is in fact what Propagation Delay **is**. Any opamp designer and any amplifier designer worth his salt will be quite concerned about that number!
So- its only when volume is *changed* that pitch is affected? So as long as we don't change the volume, there's no worries.
It must be a subtle effect as there are Voltage Control Amplifiers on my synthesizer that I routinely use to modulate my volume with a Low Frequency Oscillator (as an effect), but I've never associated that with a pitch change nor has anyone mentioned it on the various synthesizer groups I monitor (and they talk about a lot of stuff like this). My instrument tuner can't detect a difference either!
So- you did not answer the question- over a 20db range, how much pitch change will be observed? Let's assume that the volume is being changed by 20db over a period of 1/2 second.
I assume you must have documented effects like this in order to prove or disprove your hypothesis, so you must also therefore be able to predict the pitch change if you know the volume change over time. there must be a formula? Like Pitch=something something X frequency divided by time :)
What happens in-between is not monitored - it is assumed.
This is not true; this is in fact what Propagation Delay **is**. Any opamp designer and any amplifier designer worth his salt will be quite concerned about that number!
So- its only when volume is *changed* that pitch is affected? So as long as we don't change the volume, there's no worries.
It must be a subtle effect as there are Voltage Control Amplifiers on my synthesizer that I routinely use to modulate my volume with a Low Frequency Oscillator (as an effect), but I've never associated that with a pitch change nor has anyone mentioned it on the various synthesizer groups I monitor (and they talk about a lot of stuff like this). My instrument tuner can't detect a difference either!
So- you did not answer the question- over a 20db range, how much pitch change will be observed? Let's assume that the volume is being changed by 20db over a period of 1/2 second.
I assume you must have documented effects like this in order to prove or disprove your hypothesis, so you must also therefore be able to predict the pitch change if you know the volume change over time. there must be a formula? Like Pitch=something something X frequency divided by time :)