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MPC-1000 Can't fill the whole RAM


I'm running an MPC-1000 with 128MB RAM

I turn on the MPC, go to load options and it shows Wave Free = 115.5MB. I load a bunch of samples and when the Wave Free reach around 60MB all the samples I load from that exact moment show the question mark at the begining (?Sample01), indicating that the sample do not load correctly. It's always happen when the Wave Free gets around 60MB. It's that normal?

All the samples are tested and works fine, I run the RAM test and all 4 test passed. Maybe it's not mapping the memory correctly or module it's faulty... How about to try another ram module? Or do you think it's something else?

Any sugestions?

Thanks in advance.
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  • Hey José,

    Thanks for posting!

    Sorry you're having some trouble with that! The MPC1000 is a legacy product with limited support. If the MPC is indicating that there is still space available in RAM, you should be able to add more content. After adding some content into RAM, you can try looking at the Sample Memory Window (press the Window key in the Record page - see page 52 of the MPC1000 user guide) to see how much free memory is available.

    If possible, I would recommend testing with a different RAM module to see if you can reproduce the same behavior.

    This does sound like it is related to the memory itself but if you suspect this could be relative to the MPC hardware, we can help you coordinate service. Warranty and non-warranty claims are not handled here on the forum, but I can point you in the right direction! Here are a couple of options that you could choose from:

    • Submit a Warranty or Service inquiry with our Technical Support team by logging onto the Akai Pro Support Page. Select Warranty or Service Inquiry from the drop down menu.


    • For quicker support, call your nearest Support Office or International Distributor.

    Make sure to reference or link this thread to help out the support team.

    I hope this helps! Let me know if you have any additional questions.
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  • Hello Nick. Thanks for your reply.

    I've been playing around and got different results, note that previously I was loading pgm's all the time:

    * Turn on MPC, load 16 pgm's full of samples on A,B,C,D banks. Yes, a lot of samples. Note that if I load other pgm, the issue appears (samples loaded with question mark) ~60MB Wave Free left .
    * Start to load samples instead of pgm's and it loads correctly. 30MB of Wave Free left.
    * Load the last pgm and not working, samples loaded with the question mark.
    * I realized that MPC it's taking some time changing from "Load mode" to "Program mode", it freezes around 2-3 seconds. I think this is because all the samples loaded / memmory it's almost full / machine it's processing programs and samples.

    I also tried:
    * Turn on MPC and load samples instead of pgm's until RAM it's almost full (30MB Wav Free)
    * Load pgm's until RAM it's full and it loads all fine.
    * Realized that changing form" Load mode" to "Program mode" it's almost instant.

    So my conclussion is that I can fill the whole RAM but not with just pgm's, maybe it's a MPC limitation? or maybe pgm's are more heavy for MPC to process? Bug?

    I check the MPC manual and the installed RAM module it's not on the QVL (Qualified Vendor List) so this is why I'm suspecting of it. I found a RAM module for 10$ and it's on the QVL, so for that price maybe it's worth to give it a try.

    I suggest you to try, as far as possible, to fill out the RAM with just pgm's and check if the issue appears and/or if you note the MPC is running kind of slow when changing modes (From Load Mode to Program Mode, then to Record Mode...etc). This will clear out some doubts I have.

    Thanks : )
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  • Hi again.

    Last week I received the new RAM module, installed it and the issue persist, so I can tell for sure is not a RAM problem. I did some tests and I realized it happens with just some PGM’s, so I reprogramed them with MPCMaid, tested again but didn’t solve it.

    So, I started looking to those PGM’s and found out that it composed by small size samples (~ 50KB) while other pgm’s are composed by more bigger samples (200KB~500KB or even more, like 5MB).
    Some calculations I made: the problematic pgm’s are full of samples on 4 banks (A, B, C, D), so:
    • 4 banks * 16 pad’s each bank = 64pads
    • 64 pads * ~50KB each sample = 3200KB total memory for that 64 samples.
    • If I load 17 similar pgm’s would be something like: 3200KB * 17 = 54400KB
    • And 64 pads * 17 pgm’s = 1088 samples.

    My deduction is, don’t know if I’m correct, that some free memory left in MPC but is managing a lot of samples; I also feel the MPC a bit slow when I change from Load Mode to Program Mode. I’m thinking about maybe there is a limit of number of samples the MPC can manage even if it still have some free memory left. Loading other pgm’s the RAM fill completely with ~10 pgm’s and the MPC change form Load Mode to Program Mode almost instantly: 10pgm’s * 64 = 640 samples for the MPC to manage (bit more than the half of the previous test)

    I think there is a limitation on the number of samples MPC can manage and maybe the machine has a relation between RAM size and number of samples, figuring that with 128MB you can manage a limit number of samples (let’s say 1000 samples, for example), if you override that limit the MPC turns slow and samples will not load correctly even if free memory left.

    One of the “problematic” kit it’s the Beat Maker Tool Kit and maybe does not have much sense to load it all and manage 64 kicks samples, 128 hithat samples, other 128 snares samples ... and so on. I loaded the whole kit just for testing and I think the way to work is selecting samples one by one and create your own pgm’s with the samples you like, the essentials. Anyway, I feel the MPC is working well after some deep testing: I can fill the whole RAM and even with the “limitation” I can manage a lot of samples, so I’m happy about that. What I have left for now on is to work with MPC and make beats like a beast.

    I copy the link of the Beat Maker Tool Kit, if you have it you can test it (try to load all the pgm’s of the kit), just to confirm the issue and take a looong breath :D

    Thank you
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