Methods and apparatus to provide an infrared signal

1. A method, comprising:

receiving a first signal from a first device, the first signal being analog and representative of a command;

linearly manipulating the first signal in analog form, wherein the manipulated signal remains analog; and

relaying the manipulated signal to a second device, the relayed manipulated signal being representative of the command, wherein the relayed manipulated signal is indistinguishable from the first signal by the second device such that the second device receives the first signal and the relayed manipulated signal as a single signal.

2. The method of claim 1 , wherein manipulating the first signal comprises:

amplifying the first signal;

filtering the first signal;

offsetting the first signal; and

providing a current source to the first signal, wherein the current source is linear.

3. The method of claim 1 , wherein the first signal is an infrared signal.

4. The method of claim 1 , wherein the manipulated signal is relayed using at least one light-emitting diode.

5. The method of claim 1 , wherein the relayed manipulated signal is indistinguishable from the first signal by the second device such that the second device processes the single signal to execute the command.

6. The method of claim 1 , wherein the single signal is a sum of the first signal and the relayed manipulated signal.

7. The method of claim 1 , wherein the method is executed by a playback device.

8. An apparatus, comprising:

an infrared provider to:

receive a first signal from a first device, the first signal being analog and representative of a command;

linearly manipulate the first signal in analog form, wherein the manipulated signal remains analog; and

relay the manipulated signal to a second device, the relayed manipulated signal being representative of the command, wherein the relayed manipulated signal is indistinguishable from the first signal by the second device such that the second device receives the first signal and the relayed manipulated signal as a single signal.

9. The apparatus of claim 8 , wherein the infrared provider is to:

amplify the first signal;

filter the first signal;

offset the first signal; and

provide a current source to the first signal, wherein the current source is linear.

10. The apparatus of claim 8 , wherein the manipulated signal is relayed using at least one light-emitting diode.

11. The apparatus of claim 8 , wherein the relayed manipulated signal is indistinguishable from the first signal by the second device such that the second device processes the single signal to execute the command.

12. The apparatus of claim 8 , wherein the single signal is a sum of the first signal and the relayed manipulated signal.

13. The apparatus of claim 8 , wherein the infrared provider is located within a playback device.

14. An audio playback device, comprising:

an audio output device to generate an audio signal based on an audio signal source;

a processor to control the audio output device; and

an infrared provider to:

receive a first signal from a first device, the first signal being analog and representative of a command;

linearly manipulate the first signal in analog form, wherein the manipulated signal remains analog; and

relay the manipulated signal to a second device, the relayed manipulated signal being representative of the command, wherein the relayed manipulated signal is indistinguishable from the first signal by the second device such that the second device receives the first signal and the relayed manipulated signal as a single signal.

15. The device of claim 14 , wherein the relayed manipulated signal is indistinguishable from the first signal by the second device such that the second device processes the single signal to execute the command.

16. The device of claim 14 , wherein the single signal is a sum of the first signal and the relayed manipulated signal.

17. The apparatus of claim 8 , wherein the first signal is an infrared signal.