Radio EQ

[redblade8]

My friend has an EQ built into his truck radio that allows him to change the EQ setting's ( plus bass and treble ) while listening to the radio.

What would you think about this if Rockbox had this implemented?

Also, an option to add echo to songs 3% Echo, 18%echo...etc..to 100%?  So what do you think? ^^

[saratoga]

Not sure if thats even possible on a lot of devices.  Radio is usually routed to the DAC from the tuner without passing through the CPU so theres no chance to apply digital effects. 

[redblade8]

Oh. I guess you'd Be right about that.

If it comes straight from the tuner , then what's being played is what's being played.

What about what is being outputted to the headphones? This can be manipulated by EQ? Or maybe something that the Sound from the Radio can go through before being played... I'm Not really sure.


Having Echo for just playing songs should Be possible though.

[saratoga]

Having Echo for just playing songs should Be possible though.

If theres a target out there that can route it through the CPU, then sure, you could do whatever you wanted with enough work. 

[nls]

On targets that can do ful duplex it could be possible, you'd record samples from the radio, porocess them and then play them back. Not all targets' hardware can do it though IIUC. If your target has effects built into the DAC (like bass/treble) they may be applied to the analog audio from the radio already though.

[redblade8]

Well, for this to be actually useful to rockbox, it has to work on all Targets not just some , am I right?

Nls, I am unsure what your acronym means, IIUC =]
...wait I am seeing DAC twice now, this isn 't DAP then..? I'm not sure what this acronym is as well. Could you clarify? Thanks ^^

Nls, when you said that 'you'd record samples from the radio, process them, and then play them back' ...

This can be done with pre-recording? Or buffering..you mean?

[Chronon]

IIUC = If I understand correctly
DAC = Digital to Analog Converter

The device has to be able to duplex the input/output channels (i.e. perform operations on both [sets of] channels in parallel rather than serially).

[AlexP]

If a feature is limited to only some targets because the others lack the hardware to do it, then that is fine.  Otherwise nothing would have FM radio, as not all targets have a tuner.

[saratoga]

Nls, I am unsure what your acronym means, IIUC =]
...wait I am seeing DAC twice now, this isn 't DAP then..? I'm not sure what this acronym is as well. Could you clarify? Thanks ^^

If you don't know what something means, I recommend google:

http://www.google.com/search?aq=f&ie=UTF-8&q=DAC

[nls]

It was a bit unclear, DAC does indeed stand for Digital to Analog Converter, but i used it loosely for the chip that daps have to do DAC, recording, amplification, etc it is also sometimes known as a codec.

So what i meant to say is that your suggestion is probably possible to implement on some targets, those that can do full duplex but probably not on the others. If I Understand Correctly.

[TexasRockbox]

I do notice that by changing the bass and treble on the Cowon X5 that *something* happens to the FM sound.  The volume changes and the tone quality seems to change as well but not as expected.