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| | |-+  Question about EQ on iPod Classic 5.5 Video - Dev build.
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Author Topic: Question about EQ on iPod Classic 5.5 Video - Dev build.  (Read 3702 times)

Offline brushwolf

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  • Posts: 3
Question about EQ on iPod Classic 5.5 Video - Dev build.
« on: September 29, 2024, 09:45:13 AM »
Hello, all. I wanted to ask if there is a streamlined way to transfer our EQ .txt files to the iPod, or if we can dial in exact numbers with point decimals in between 0 and 5 values on the parametric EQ. From what I gather, we can't dial in the exact numbers or use our own presets.

Appreciate all the help, thank you.
« Last Edit: September 29, 2024, 01:18:17 PM by saratoga »
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Offline rockbox_dev123

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Re: Question about EQ on iPod Classic 5.5 Video - Dev build.
« Reply #1 on: September 29, 2024, 09:48:59 AM »
You can create or modify the equalizer presets in the .rockbox/eqs folder with the text editor of your choice.

I did this recently to port an EQ I was testing to rockbox:

Rockbox:
Code: [Select]
eq enabled: on
eq precut: 66
eq low shelf filter: 105, 7, 90
eq peak filter 1: 8983, 26, 44
eq peak filter 2: 54, 4, -54
eq peak filter 3: 1148, 23, -15
eq peak filter 4: 491, 12, 6
eq peak filter 6: 7451, 39, 20
eq peak filter 7: 4502, 60, -17
eq peak filter 8: 1937, 39, 9
eq high shelf filter: 10000, 7, -39

Qudelix:
Code: [Select]
CH: 0
TYPE: PEQ
Preamp: -6.6 dB
Xfeed: 1 0
Filter 1: ON LS Fc 105 Hz Gain 9.0 dB Q 0.700
Filter 2: ON PK Fc 8983 Hz Gain 4.4 dB Q 2.630
Filter 3: ON PK Fc 54 Hz Gain -5.4 dB Q 0.480
Filter 4: ON PK Fc 1148 Hz Gain -1.5 dB Q 2.380
Filter 5: ON PK Fc 491 Hz Gain 0.6 dB Q 1.230
Filter 6: ON HS Fc 10000 Hz Gain -3.9 dB Q 0.700
Filter 7: ON PK Fc 7451 Hz Gain 2.0 dB Q 3.910
Filter 8: ON PK Fc 4502 Hz Gain -1.7 dB Q 6.000
Filter 9: ON PK Fc 1937 Hz Gain 0.9 dB Q 3.930
Filter 10: ON PK Fc 5639 Hz Gain -0.9 dB Q 6.000
Filter 11: OFF PK Fc 0 Hz Gain 0.0 dB Q 0.000
Filter 12: OFF PK Fc 0 Hz Gain 0.0 dB Q 0.000
Filter 13: OFF PK Fc 0 Hz Gain 0.0 dB Q 0.000
Filter 14: OFF PK Fc 0 Hz Gain 0.0 dB Q 0.000
Filter 15: OFF PK Fc 0 Hz Gain 0.0 dB Q 0.000
Filter 16: OFF PK Fc 0 Hz Gain 0.0 dB Q 0.000
Filter 17: OFF PK Fc 0 Hz Gain 0.0 dB Q 0.000
Filter 18: OFF PK Fc 0 Hz Gain 0.0 dB Q 0.000
Filter 19: OFF PK Fc 0 Hz Gain 0.0 dB Q 0.000
Filter 20: OFF PK Fc 0 Hz Gain 0.0 dB Q 0.000
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Offline brushwolf

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Re: Question about EQ on iPod Classic 5.5 Video - Dev build.
« Reply #2 on: September 29, 2024, 09:59:46 AM »
https://imgur.com/a/U75Z91R

Oh thank you, that's what I need. But I can't find that folder, where do we put the EQ files and in which format?
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Offline rockbox_dev123

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Re: Question about EQ on iPod Classic 5.5 Video - Dev build.
« Reply #3 on: September 29, 2024, 10:07:22 AM »
Quote from: brushwolf on September 29, 2024, 09:59:46 AM
https://imgur.com/a/U75Z91R

Oh thank you, that's what I need. But I can't find that folder, where do we put the EQ files and in which format?

Create the folder if it doesn't exist. Save the files with the .cfg extension. I gave an example of the format above.
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Offline brushwolf

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Re: Question about EQ on iPod Classic 5.5 Video - Dev build.
« Reply #4 on: September 29, 2024, 11:44:36 AM »
Thank you so much for your help, I managed to do it. Another question, I have songs in 16/44 ALAC, with EQ my 5.5 iPos Video is still a little slow to navigate while a song is playing. Is this normal? The songs are about 890-1000kbps. Should I swtich to AIFF for easier playback or are there any options I can tweak?
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Offline rockbox_dev123

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Re: Question about EQ on iPod Classic 5.5 Video - Dev build.
« Reply #5 on: September 29, 2024, 12:39:37 PM »
Quote from: brushwolf on September 29, 2024, 11:44:36 AM
with EQ my 5.5 iPos Video is still a little slow to navigate while a song is playing. Is this normal?

In my experience using EQ incurs a performance penalty. This is likely due to the CPU in the 5.5 being less powerful than the 6th gen. Although, I have not yet tested EQ with my 6th gen to compare performance.
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Offline saratoga

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Re: Question about EQ on iPod Classic 5.5 Video - Dev build.
« Reply #6 on: September 29, 2024, 01:19:29 PM »
Quote from: brushwolf on September 29, 2024, 11:44:36 AM
Thank you so much for your help, I managed to do it. Another question, I have songs in 16/44 ALAC, with EQ my 5.5 iPos Video is still a little slow to navigate while a song is playing. Is this normal? The songs are about 890-1000kbps. Should I swtich to AIFF for easier playback or are there any options I can tweak?

Your CPU is only fast enough for 4-5 EQ bands, so limit yourself to as few as you need.
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