[HiFiChris]

@napka : Is it true that your RB build has got the same volume step size in dB as the official iBasso FW?
How do I exactly install your RB build? You said I would have to patch the official FW with the boot loader where exactly do I find that boot loader and how do I patch the FW with it? I searched on the forums but didn't find a solution, maybe I used the wrong keywords.
 
It would be nice if someone could provide me some help as I only have experience with installig RB to the Sansa Clip Zip/Clip + by using RockBoxUtility and the only other experience I have with swapping/modifying FWs is applying a JailBreak to an iPhone. As you see, all of those mods I've done so far are automated and I have no experience by doing them manually.
 
Just wondering: is there any other RB build offering the exact same volume step size as the OFW?

 

[napka]

  @napka : Is it true that your RB build has got the same volume step size in dB as the official iBasso FW?
How do I exactly install your RB build? You said I would have to patch the official FW with the boot loader where exactly do I find that boot loader and how do I patch the FW with it? I searched on the forums but didn't find a solution, maybe I used the wrong keywords.
 
It would be nice if someone could provide me some help as I only have experience with installig RB to the Sansa Clip Zip/Clip + by using RockBoxUtility and the only other experience I have with swapping/modifying FWs is applying a JailBreak to an iPhone. As you see, all of those mods I've done so far are automated and I have no experience by doing them manually.
 
Just wondering: is there any other RB build offering the exact same volume step size as the OFW?

I'm not sure about volume step, but it uses the same digital DAC volume control as original fw. It's smooth enough so I had no problems with listening for LOTS of earphones including ultra sensitive ones like UE18. It's not like when you have 16 volume steps or something like that.
 
1. Unzip and copy rockbox to inner memory.
2. Install patched firmware as if you update official firmware.
3. Switch Mango and Rockbox by turning on hold switch on power up.
 
You can get patched firmware here.

 

[HiFiChris]

@napka: thank you, I am currently downloading both the RB and the FW folders from your website and some additional themes. I am reporting soon if everything has worked and if it has got the same step size with the 255 adjustment steps.
 
Which RB implementations also have got the 255 volume steps the OFW offers?

 

[napka]

@HiFiChris, Rockbox ports are very similar. Headwhacker did most job to make RB work at DX90. DX50 guys ported most of his changes to official rockbox repository and I'm fixing bugs. So it's a kind of evolution, not different implementations.
 
I've just checked: volume up/down presses adjust volume by 1 from 0 to 255.

 

[headwhacker]

each volume step in the OFW is 0.5 dB. Rockbox has 1dB steps, at least on my last build. If napka has matched the OFW then it should be 0.5dB steps as well.

 

[napka]

  each volume step in the OFW is 0.5 dB. Rockbox has 1dB steps, at least on my last build. If napka has matched the OFW then it should be 0.5dB steps as well.

I was watching /sys/class/codec/es9018_volume contents and pressed volume buttons.

 

[headwhacker]

 
I was watching /sys/class/codec/es9018_volume contents and pressed volume buttons.

 
Yeah that is 0.5dB each step

 

[nmatheis]

I am *pretty sure* I already reported in this thread that Napka's Rockbox build does indeed have 255 volume steps - same as stock firmware.

 

[cholero]

Comment from the official rockbox sources(thanks, ArgelErx)
/* See codec-dx90.h. -2550 to 0 -> 0 to 255 */
int volume_adjusted = ((volume + 2550) / 10);

So it should be 255 for the official build. This would be wrong then.... for every displayed dB, the volume changes only 0.5 dB (or am I wrong?). Well, if everyone prefers it that way... I cant find a real datasheet for the DAC chip explaining all the I2C commands

 

[cholero]

Found the datasheet:
Volume Control 
Each output channel has its own attenuation circuit. The attenuation for each channel is controlled independently. Each channel can be attenuated from 0dB to –127dB in 0.5dB steps. 

 

[mfrahme]

Hi. This is my first post.Hope I'm doing it right. I'm using the Rockbox, along with the DX90 firmware V2.1.5 with Lurkers. My question is this: As iBasso releases new firmware updates, will I be able to use them or will it somehow affect my Rockbox? I keep hoping that they will release something that will help improve battery life, if that's even possible.  I'd appreciate any feedback you could give me.  Thanks!

 

[uli87]

  Hi. This is my first post.Hope I'm doing it right. I'm using the Rockbox, along with the DX90 firmware V2.1.5 with Lurkers. My question is this: As iBasso releases new firmware updates, will I be able to use them or will it somehow affect my Rockbox? I keep hoping that they will release something that will help improve battery life, if that's even possible.  I'd appreciate any feedback you could give me.  Thanks!

 
Welcome to the forums
 
I am also using the dual 2.1.5L/RockBox and am so happy with it (thanks again to all who helped make it possible)
 
If you want to use RB and Stock/Lurker in the same configuration you have now, I think headwhacker would have to "glue" the newest FW with RockBox for you to have what you are asking for. You could install the newest Lurker but wouldn't have the RockBox in dual boot with it.
 
I am perfectly happy with RockBox only!

 

[nmatheis]

Actually, I think headwhacker's leaving that for napka now.

Whenever there's an updated Lurker0 fw, you'll need to wait for someone like headwhacker or napka to provide a patched update.img file that allows dual-boot.

 

[napka]

FW 2.2.0 + Lurker's L0 + RB Loader
If you're using modern rockbox, just update as usual: unpack, copy update.img, boot Mango, choose Settings -> Advanced Settings -> Firmware update.

 

[mfrahme]

Thanks for the advice/help uli87, nmatheis and napka.