Buggy Sound when Volume is Low, Low Volume isnt Low enough

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Buggy Sound when Volume is Low, Low Volume isnt Low enough

Unread postby Molack » Thu Jul 12, 2018 4:34 am

Hi.

I just got my odroid go and really like it.

I did all the latest updates, but there are three things that I don't find really perfect:

1) when graphics are scaled, the screen reacts some kind of laggy like there is not enough performance. Is this a general performance problem or could it be resolved?
2) the sound is really good - but only at highest Volume. No Matter what emulator I use, it feels like only some voices are set to lower volume when I lower the volume. The distortion sounds seem to be always at max Volume, so they seem much louder at lowest Volume and the sound is distorted at all.
3) I often play in low volume situations. That's why I claim about point 2. There are only 3 options in volume level, but even volume level 1 is too loud for most situations.

Can I do anything? Can anybody confirm the distortion Problem?
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Re: Buggy Sound when Volume is Low, Low Volume isnt Low enou

Unread postby db9979 » Thu Jul 12, 2018 4:57 am

Did you erase the flash before flashing your device?
BTW the newest firmware version has 4 Sound Values
Did you see already our Rom List - and many other Informations?
Go here:
https://odroidgo.db-cloud.de
Facebook-Group
https://www.facebook.com/groups/odroidgo/
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Re: Buggy Sound when Volume is Low, Low Volume isnt Low enou

Unread postby Molack » Thu Jul 12, 2018 5:13 am

db9979 wrote:Did you erase the flash before flashing your device?
BTW the newest firmware version has 4 Sound Values

Thank you,

just realized, I dont have the latest FW. I have 20180702.

But how in hell do I upgrade to 20180710? Holding B when Booting doesnt work even if i hold a minute.
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Re: Buggy Sound when Volume is Low, Low Volume isnt Low enou

Unread postby Ricket » Thu Jul 12, 2018 7:05 am

You must first flash the "odroid-go-firmware" version 20180708 with the old flashing procedure: viewtopic.php?f=159&t=31348#p227952

That adds the ability to just use the firmware.bin easy update.
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Re: Buggy Sound when Volume is Low, Low Volume isnt Low enou

Unread postby Molack » Thu Jul 12, 2018 7:14 am

Ricket wrote:You must first flash the "odroid-go-firmware" version 20180708 with the old flashing procedure: viewtopic.php?f=159&t=31348#p227952

That adds the ability to just use the firmware.bin easy update.


Thanks, that worked. Quite confusing, I understood to flash 20180702 to be able to do the power an b Button trick
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Re: Buggy Sound when Volume is Low, Low Volume isnt Low enou

Unread postby crashoverride » Thu Jul 12, 2018 9:35 am

Firmware versions 20180708 and later use the next-gen firmware loader (power + B).
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Re: Buggy Sound when Volume is Low, Low Volume isnt Low enou

Unread postby Molack » Thu Jul 12, 2018 11:50 pm

Thank you, latest updates worked.

But the sound seems still to loud at lowest level and buggy.
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Re: Buggy Sound when Volume is Low, Low Volume isnt Low enou

Unread postby rooted » Fri Jul 13, 2018 12:44 am

The lower the volume the lower quality the sound, is just how it works with the inexpensive mono dac used. My understanding anyway.
Molack wrote:Thank you, latest updates worked.

But the sound seems still to loud at lowest level and buggy.
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Re: Buggy Sound when Volume is Low, Low Volume isnt Low enou

Unread postby Molack » Fri Jul 13, 2018 1:40 am

rooted wrote:The lower the volume the lower quality the sound, is just how it works with the inexpensive mono dac used. My understanding anyway.
Molack wrote:Thank you, latest updates worked.

But the sound seems still to loud at lowest level and buggy.


So... We say it is as it is :)

I find the emulation performance really good and there is no noticeable input lag. That's impressing for this Hardware.

So I will manage to live with the buggy volume. For me, a solution could be to solder a resistor onto the speaker. Because I find the lowest setting not low enough, but medium volume is more than loud enough. So I can play at low/medium volume with good sound.
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Re: Buggy Sound when Volume is Low, Low Volume isnt Low enou

Unread postby mad_ady » Fri Jul 13, 2018 2:41 am

If HK makes a future revision of the board, I'd suggest adding a headphone jack as well. One with mono duplicated as fake stereo.
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Re: Buggy Sound when Volume is Low, Low Volume isnt Low enou

Unread postby rooted » Fri Jul 13, 2018 3:44 am

+1 ^^^
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Re: Buggy Sound when Volume is Low, Low Volume isnt Low enou

Unread postby Molack » Fri Jul 13, 2018 7:38 am

mad_ady wrote:If HK makes a future revision of the board, I'd suggest adding a headphone jack as well. One with mono duplicated as fake stereo.

For 20th anniversary ;)
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Re: Buggy Sound when Volume is Low, Low Volume isnt Low enou

Unread postby crashoverride » Fri Jul 13, 2018 9:59 am

The volume is digitally controlled. To decrease volume, sound sample amplitudes are mathematically reduced. Due to this, a reduction in volume is also a reduction in resolution (bit depth). The ESP32 DAC is 8 bit. At the lowest volume setting, sound is reduced to "1.5 bits". This means two things: 1) sound can not be further reduced and 2) low volume sounds will be distorted.

A possible solution would be to insert a circular cut piece of felt (or other material) into the speaker cavity during assembly. This should reduce the overall speaker volume.
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Re: Buggy Sound when Volume is Low, Low Volume isnt Low enou

Unread postby odroid » Tue Jul 17, 2018 5:36 pm

Change R1 & R9 resistors to 1Mohm from 100Kohm on the PCB if your soldering skill is okay.
Refer this test report if you really need a quieter sound level.
https://wiki.odroid.com/odroid_go/silent_volume
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Re: Buggy Sound when Volume is Low, Low Volume isnt Low enou

Unread postby Molack » Wed Jul 18, 2018 4:05 am

odroid wrote:Change R1 & R9 resistors to 1Mohm from 100Kohm on the PCB if your soldering skill is okay.
Refer this test report if you really need a quieter sound level.
https://wiki.odroid.com/odroid_go/silent_volume


Thank you very much. I am very good in soldering SMB, but I would never touch my odroid go. I am thinking about buying another one and integrating an potentiometer and a headphone jack as the original Gameboy had. But that seems far away as long as I want to stay married
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