8051 5.1 Compressor

User Guide

 

 

 

4

8

 

 

 

4ms

6ms

 

 

 

 

A

 

0

 

 

 

 

 

8ms

 

GAIN REDUCTION

 

 

 

 

 

 

 

 

 

 

 

 

12

 

 

 

 

 

 

 

4

 

 

 

 

2ms

 

16ms

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

16

 

 

 

 

 

 

 

 

 

 

8

 

 

 

 

 

 

 

 

 

8

12

 

 

 

 

 

 

 

 

 

 

 

4

16

4

0

-10

 

 

+20

3:1

4:1

 

 

.4s

.8s

0

20

8

 

4

 

 

2:1

 

 

6:1

 

.2s

 

1.5s

dB

 

 

 

MAKE-UP

 

 

 

 

ATTACK

 

 

 

 

12

 

8

GAIN dB

1.5:1

 

 

max

.1s

 

3s

 

16

 

12

 

 

 

 

 

 

 

 

 

 

 

-20

 

+16

 

 

 

 

 

 

 

 

 

 

 

THRESHOLD dBu

 

 

 

RATIO

 

 

RECOVERY

 

 

 

 

 

4

8

 

 

 

4ms

6ms

 

 

 

 

B

 

0

 

 

 

 

 

8ms

 

 

 

 

 

 

 

 

 

 

 

 

 

GAIN REDUCTION

 

 

 

 

12

 

 

 

 

 

 

 

4

 

 

 

 

2ms

 

16ms

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

16

 

 

 

 

 

 

 

 

 

 

8

 

 

 

 

 

 

 

 

 

8

12

 

 

 

 

 

 

 

 

 

 

 

4

16

4

0

-10

 

 

+20

3:1

4:1

 

 

.4s

.8s

0

20

8

 

4

 

 

2:1

 

 

6:1

 

.2s

 

1.5s

dB

 

MAKE-UP

ATTACK

 

 

12

8 GAIN dB 1.5:1

max

.1s

3s

16

12

 

 

 

-20

+16

 

 

 

THRESHOLD dBu

RATIO

 

RECOVERY

Threshold

Threshold is the level above which compression begins. Each channel linked to a sidechain (using the SC Link buttons) takes that sidechain's threshold. If a channel is linked to sidechains A and B the lower value of the two controls is used. The threshold controls have a range of -20dBu to +16dBu, adjustable in 2dB steps. Each channel's threshold may be modified by up to ±15dB irrespective of its linking by using the SC Trim controls.

￿A red LED indicator is provided in each sidechain link button. This indicates that a channel is above threshold, and either is the dominant signal or within 2dB of the dominant signal on that sidechain.

Gain Makeup

Gain Makeup is used to restore the average level or loudness of a compressed signal. Linking control voltage to a channel (with the CV Link buttons) assigns either the A or B Gain Makeup control to that channel. If control voltage from both sidechains is linked the larger of the two values is used; this is because the sidechain with the greater gain reduction will be controlling the channel. The gain applied is adjustable from -10 to +20dB in 2dB steps.

Ratio

Ratio controls the amount of gain reduction applied as the input level increases.

At 2:1 for example, a change of 10dB at the input produces a change of 5dB at the output. Values available are 1.5:1, 2:1, 3:1, 4:1, 6:1, and 'max' (approximately 8:1).

The 8051 has a soft-knee characteristic, and its ratio gradually increases as the compression becomes heavier at all settings. The numbers given should therefore be considered average values.

Issue 2

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AMS 8051 specifications Threshold, Gain Makeup, Ratio

8051 specifications

The AMS 8051 is a sophisticated microcontroller that has become a favorite among developers and engineers due to its robust performance and versatile applications. Known for its compatibility with the widely used 8051 architecture, the AMS 8051 integrates various features and technologies that enhance its effectiveness in embedded systems.

One of the main features of the AMS 8051 is its 8-bit microcontroller design, which allows it to process data efficiently while maintaining a balance of performance and power consumption. The device typically includes 4KB to 64KB of on-chip ROM and up to 4KB of RAM, providing ample memory for program storage and variable data. Furthermore, the AMS 8051 features a flexible clock speed, usually ranging from 12 MHz to 40 MHz, which allows it to adapt to different operational requirements.

Another notable characteristic of the AMS 8051 is its rich set of input/output ports. It usually includes at least four parallel I/O ports and supports serial communication via UART protocols. This feature makes it highly suitable for interfacing with a wide range of peripherals, such as sensors and actuators, which is essential for developing integrated systems in industries like automotive, telecommunications, and consumer electronics.

The AMS 8051 microcontroller also shines in terms of power management. It typically incorporates various power-saving modes, allowing it to operate efficiently in battery-powered applications. These modes help to extend battery life by minimizing power consumption during idle periods.

In terms of technology, the AMS 8051 is often equipped with advanced interrupt handling capabilities. This feature enables the microcontroller to respond swiftly to external events, making it particularly useful in real-time applications where timely responses are crucial. Additionally, the device supports a range of programming languages, including assembly and C, providing flexibility for developers in their coding preferences.

With its extensive feature set, innovative technologies, and characteristics tailored for modern applications, the AMS 8051 microcontroller stands out in the crowded field of embedded systems. Its combination of performance, reliability, and versatility makes it a preferred choice for many engineering projects, ensuring that it remains relevant in an ever-evolving technological landscape. Whether for hobbyists or industrial applications, the AMS 8051 continues to prove itself as a capable and efficient solution for embedded control.