Automatic intelligent audio-tracking response circuit

A circuit automatically adjustable in response to an input audio signal to provide a dc control signal having the attack and release characteristics of the input audio signal comprising:

• an input reference node for receiving a reference signal which is a function of the input signal;
• an output reference node for providing the dc control signal;
• an intermediate reference node between said input and output reference nodes;
• diode means connected between said input and intermediate nodes for permitting forward conduction from said input node to said intermediate node;
• a first signal path means connected between said intermediate and output nodes for providing a slow release time when said reference signal has a slow decay envelope and for providing a slow attack time when said reference signal has a slow increase envelope;
• a second signal path means connected between said output and input nodes for providing a fast release time when said reference signal has a fast decay envelope and for cooperating with said first signal path means to provide a corresponding variable intermediate range of release times when said reference signal has a variable intermediate decay envelope;
• and
• a third signal path means connected between said intermediate and output nodes for providing a fast attack time when said reference signal has a fast increase envelope and for cooperating with said first signal path to provide a corresponding variable intermediate range of attack times when said reference signal has a variable intermediate increase envelope.

A circuit automatically adjustable in response to an input audio signal to provide a dc control signal having the release characteristics of the input audio signal comprising:

• an input reference node for receiving a reference signal which is a function of the input signal;
• an output reference node for providing the dc control signal;
• an intermediate reference node between said input and output reference nodes;
• first diode means connected between said input and intermediate nodes for permitting forward conduction from said input node to said intermediate node;
• grounded capacitive means connected to said output node for storing a charge at said output node;
• grounded highly resistive means connected to said intermediate node for dissipating said charge stored at said output node;
• a first signal path connected between said intermediate and output nodes having a moderately resistive means cooperable with said highly resistive means for providing a slow release time when said reference signal has a slow decay envelope;
• and
• a second signal path connected between said output and input nodes having a low resistive means connected in series with a second diode means permitting forward conduction from said output node to said input node for providing a fast release time when said reference signal has a fast decay envelope and for cooperating with said first signal path to provide a corresponding variable intermediate range of release times when said reference signal has a variable intermediate decay envelope.

A circuit automatically adjustable in response to an input audio signal to provide a dc control signal having the attack and release characteristics of the input audio signal comprising:

• an input reference node for receiving a reference signal which is a function of the input signal;
• an output reference node for providing the dc control signal;
• an intermediate reference node between said input and output reference nodes;
• first diode means connected between said input and intermediate nodes for permitting forward conduction from said input node to said intermediate node;
• grounded capacitive means connected to said output node for storing a charge at said output node;
• grounded highly resistive means connected to said intermediate node for dissipating said charge stored at said output node;
• a first signal path connected between said intermediate and output nodes having a moderately resistive means cooperable with said highly resistive means for providing a slow release time when said reference signal has a slow decay envelope and for providing a slow attack time when said reference signal has a slow increase envelope;
• a second signal path connected between said output and input nodes having a first low resistive means connected in series with a second diode means permitting forward conduction from said output node to said input node for providing a fast release time when said reference signal has a fast decay envelope and for cooperating with said first signal path to provide a corresponding variable intermediate range of release times when said reference signal has a variable intermediate decay envelope;
• and
• a third signal path connected between said intermediate and output nodes having a second low resistive means connected in series with a third diode means permitting forward conduction from said intermediate node to said output node for providing a fast attack time when said reference signal has a fast increase envelope and for cooperating with said first signal path to provide a corresponding variable intermediate range of attack times when said reference signal has a variable intermediate increase envelope.

A circuit automatically adjustable in response to an input audio signal to provide a dc control signal having the release characteristics of the input audio signal comprising:

• means for receiving and amplifying the input signal in response to variations in the voltage thereof to produce an output signal;
• means for receiving and converting the input signal into a signal which is a function of the input signal;
• an input reference node for receiving said converted signal;
• an output reference node for providing the dc control signal;
• an intermediate reference node between said input and output reference nodes;
• diode means connected between said input and intermediate nodes for permitting forward conduction from said input node to said intermediate node;
• a first signal path means connected between said intermediate and output nodes for providing a slow release time when said converted signal has a slow decay envelope;
• and
• a second signal path means connected between said output and said input nodes for providing a fast release time when said converted signal has a fast decay envelope and for cooperating with said first signal path means to provide a corresponding variable intermediate range of release times when said converted signal has a variable intermediate decay envelope.

A circuit automatically adjustable in response to an input audio signal to provide a dc control signal having the release characteristics of the input audio signal comprising:

• an input reference node for receiving a reference signal which is a function of the input signal;
• an output reference node for providing the dc control signal;
• diode means connected between said input and output nodes for permitting forward conduction from said input node to said output node;
• a first signal path means connected to said output node having a grounded capacitive means for storing a charge at said output node and a grounded highly resistive means for dissipating said charge stored at said output node for providing a slow release time when said reference signal has a slow decay envelope;
• and
• a second signal path means connected between said output and input nodes for providing a fast release time when said reference signal has a fast decay envelope and for cooperating with said first signal path means to provide a corresponding variable intermediate range of release times when said reference signal has a variable intermediate decay envelope.

A circuit automatically adjustable in response to an input audio signal to provide a dc control signal having the release characteristics of the input audio signal comprising:

• an input reference node for receiving a reference signal which is a function of the input signal;
• an output reference node for providing the dc control signal;
• diode means connected between said input and output nodes for permitting forward conduction from said input node to said output node;
• a first signal path means connected to said output node having a grounded capacitive means for storing a charge at said output node and a highly resistive means connected to said input node for dissipating said charge stored at said output node for providing a slow release time when said reference signal has a slow decay envelope;
• and
• a second signal path means connected between said output and input nodes for providing a fast release time when said reference signal has a fast decay envelope and for cooperating with said first signal path means to provide a corresponding variable intermediate range of release times when said reference signal has a variable intermediate decay envelope.