-4db increase from FORAT????

I was looking into this....because I noticed that my samples are very low volume and when i'm trying to process the sound through a compressor it doesn't really have much to work with considering the low output from the MPC.

Any information on cost and process would be most helpful in my decision. Tanx-mon!

drumzzzzzzzz.1.

I've been thinking about this for a while. I'm pretty sure I could do it, but I'd need details that I am not qualified to gather from the service notes. If someone knows if this is just adjusting resistor values in the output amp, or if it is more complicated than that. If someone gave me some details I would try it and help others do it.

Paging Rohan Mansell.... Dr. Mansell, you have a call...

Ha. Me too. I decided to look at the service manual today but didn't get into it enough. The thing is that it's not just the output voltage but a +4 output also has to be able to drive a lower impedance load too I think and that's harder to accomplish - not just changing out resisters I know. I know how to do it with a tube line stage but I don't know how to design SS circuits. Hey... a tube output stage in a mpc-60. I like that idea. The best diy forum is www.prodigy-pro.com/forum. this would be a nice upgrade I think Ale's mpc seems a little feeble in the output.

If you check the Roger linn site, it says 12 bit non linear (quieter than linear)

Now does he mean noise? or just volume?

I don't think imnpedence would be much of an issue, doesn't an op amp buffer stage null any impedence issues? all SS synths and I have seen have buffered outputs for this reason. The amping stage is before the buffer. I'm pretty sure it would just be the amp stage feedback and input resistor that would need it, but it has to be the right resistors, which I guess you are right, that would mess with impedence if you don't get the ratios right and keep the values similar.

Oh, and the best diy board is Synth DIY, trust me

Hi Elmacaco,

I think quieter means noise not output. The outputs are actually a little hotter than standard -10 consumer since they are lesse here, -3 from the specs it looks like.


OK I'm looking at the output amps on the individual outs voice board and they use a m5220p dual op amp for each pair of channels. Dang I just don't know enough about using op-amps to substitute or go fiddling around with the feedback to get more gain - but I could do the work if someone had a circuit.

prodigy is like more for studio stuff, pres and compressors an all... I like it because they are very welcoming to girls there. For midi I love www.midibox.org, man some of the midi controllers and synths there are un-effing believable! I haven't made any synth stuff except I built a paia fatman once. I have for SID chips from old Commodores though and I'd like to make a synth from them one day. Nice meeting another DIY'er!

peace, abstract semiotics, soul,

Kiira

Oh for sure. Synth DIY is a great list for the solder minded. The guys on there are incredible, there is never any beef, and they are friendly to newbies, and females, you don't get the nonsense you get elsewhere. They go so hardcore into stuff sometimes that it's over most heads, but if you want to know they will break it down. It's mostly about synths, some guys actually cloning old synths very well, many are professional Electrical engineers, some work for NASA, or used to, and they bring their expertise to their hobbies.

Anyhow, I haven't looked at the schematics, If you remember the page number of the voice outs I'll have a quick look soon. But if they are using dual op amps they are either using an inverting amplifier followed by an inverter which will double as a buffer on the output, probably both on the same dual op amp. Inverting amps are cleaner than non inverting, but are more expensive as you need to invert the signal again (needing another op amp) They might be using a non ionverting amp with just a buffer, but considering the market for these things and the time of release, I bet they used the inverting amp, since it has less noise.

From the description given at forat, I think the mod shouldn't be too difficult, perhaps there is an amplifier before all outputs that would bring them up to +4, but it could be adjusting one resistor or a resistor pair per output. Which would take a little time, but nothing too serious.

yeah, it's fun to have DIYers here

elmacaco wrote:
Paging Rohan Mansell.... Dr. Mansell, you have a call...

Damn ... phone must have been off or on IDD receipt bar

Adjusting the gain on the MPC60 upto +4dB.

Maybe I'll have a look at the service manual and see what gives.

More later.

Rohan.

Thanks Doc!

i have a question about your guys' playing/recording levels and such:

how high do you have the volume on the MPC and the volum on your receiver when you're playing/recording beats?

for some reason i have to put the volume on my receiver (sony) at about '18' or '20' and i usually crank up the volume knob on the MPC to ~3/4 - full blast for it to sound loud enough for my liking.

now when i try to record a song with acid 4.0 i turn down the volume on the MPC knob down to ~1/2. i make sure that the meter/monitor goes up as high as possible without turning red (so there isn't any clipping).

now when i play back on my computer it sounds INCREDIBLY low. like everything is muffled. i have a stock soundcard.

when i normally use my receiver with my dj setup i only have to crank up volume to ~15. and on my computer (listening to MP3) i usually set my altec lansing speaker volume to ~1/2 and it is def. loud enough at 1/2 volume.

also, when i record samples from the turntable it sounds louder when i record than the sound that actually records.

should you ALWAYS try to get the meter/monitor thing for record levels to go as high as possible before getting the !!!'s, no matter HOW LOUD it sounds through your speakers? cuz for some samples it will sound super loud through my house speakers but it registers at only ~1/3 of the way up on the meter/monitor gauge so i have to bring the 'T' thing down to the left in order for it to recognize the sound for recording.

but i've noticed that with some samples where i've needed to set the 'T' thing (forget what it's called) nearly all the way to the right (making sure i don't get the !!!'s) the sample on playback is way too loud compared to my drum sounds. i'm wondering if this is an EQ'ing/master volume/channel volume issue with my vestax 06 mixer or a recording level issue on the MPC?

side note: i have the same problem with dude who posted the topic of only getting ~3/4 volume level while NOT using 'full level' no matter how hard you hit the pad. i was afraid i might've broken my pad after i hit this thing so f'ing hard! still, only ~3/4 volume MAX. did anyone ever post an explanation for that issue?

as always, thanks in advance for your proper knowledge dropping!

T thing is threashhold and all it does is set the sample start point based on volume, hence it being on the VU meter.

drumat!c wrote:I was looking into this....because I noticed that my samples are very low volume and when i'm trying to process the sound through a compressor it doesn't really have much to work with considering the low output from the MPC.

Any information on cost and process would be most helpful in my decision. Tanx-mon!

drumzzzzzzzz.1.

Is this Just for The Mpc 60??? Waht does this upgrade do Exactly?

Philly Stress wrote:

drumat!c wrote:I was looking into this....because I noticed that my samples are very low volume and when i'm trying to process the sound through a compressor it doesn't really have much to work with considering the low output from the MPC.

Any information on cost and process would be most helpful in my decision. Tanx-mon!

drumzzzzzzzz.1.

Is this Just for The Mpc 60??? What does this upgrade do Exactly?

Someone Please answer the above question :!::!::!::!::!::!::!:

No, someone have a look at the schems and lets see what's involved first!

elmacaco wrote:No, someone have a look at the schems and lets see what's involved first!

We'll Here I come to save my Own day! I called Forat and they said the +4db upgrade can given to ANY Machine But is Especially Effected on the MPC 60 since it's so low. What it does is make all your Outs 1-8 plus the stereo really Hot. I probably use iy when I get & if I get the dough

I might want to get this