DY1703A max memory size

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Hi,
I am designing a little alarm clock that can play MP3s as the alarm sounds. After doing some searching online, I decided to use the DY1703A chip as the MP3 player IC along with a small flash memory chip. I based some of my design off of this github link. My main issue is that any product using this IC only ever has 4MB of memory on board which isn't very much. I always notice that these products advertise "32Gbit (4Mbyte)", which makes no sense. Has anyone tried using this chip before or has any idea the actual capacity limit of it? Does anyone have any alternatives they'd suggest?

Thanks

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Yep, it's 4MB, 32Mb module.
There is DY-SV8F, 8MB and many others with sd-card slot up to 32GB

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Yes. I understand that. There are various modules created around the DY1703A such as the DY-SV8F that integrate flash memory (usually 4 or 8 MB). I'm wondering why they only put only that much though. Is there some limit to the amount of flash that that chip can address vs an SD card. On the board I'm making I'd like to put a higher capacity chip if possible.
Schematic_AlarmClockV2_2024-05-27.pdf (120.9 KB)
PCB_PCB_AlarmClockV2_2024-05-27.pdf (112.0 KB)

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Who knows, first you have to find datasheet for that specific chip

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Yeah that's a good question. Have had no such luck so far. That github link is the closest thing I have to a datasheet.

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I think it's a cinese clone of some serious chip.

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DFplayer mini modules are cheap & easy to use.
s-l400 (31)

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I had initially contemplated using the DFplayer but wanted the challenge of putting all components on the PCB instead of just using premade modules

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The DFPlayer Pro - Mini MP3 Player has 128MB Storage. Used it for my first major mp3 project then moved to the SD version with 32 GB uSD card.

Puzzled by your comment about not wanting to use pre-made modules. Some, like the DFR MP3 player, are at least comparable in price to chips with far less functionality. I get the challenge motive, but…

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