Can i add more memory to the rc50 loop pedal

Your effect loop is fried.

Pedals operate at a different level then rack units that go in the effects loop.
It needs to go in front of the amp input. Guitar to pedal to amp input.

Run a cable from the Send to the effects and a cable from the effects to the Return. This would be in place of running a cable from the bass guitar to the effects to the amp input.

http://www.roland.com/support/article/index.cfm?q=manuals&p=RC-50

I tried to look at this and get the valuable information but it requires a few steps. This is a link for the product manual, what you are looking for is on page 20 I think

This could POSSIBLY be done using an external source generating a MIDI sync clock fed to both.

It APPEARS that the MR8 does NOT include the ability to EQ. They have delay effects and the like built in, but no EQ.

To answer your question then, you would need to have an EXTERNAL EQ unit and loop the vocal through that unit to do EQ to do it right.

When mastering, the "powerful/natural/and bright would be filters that will emphasize the bass (powerful) or the treble (bright) but these are really not EQ's and you can ONLY choose one at a time.

You didn't mention which model loop station you have so I'll direct you to the link:http://www.bossus.com/gear/productdetails.php?ProductId=477 The RC20XL for instance has an undo function.The RC50 has an update to ver.1.01 also that you can dowload. I hope this info helps.

USB port for data/audio backup, import/export of loops as WAV files http://www.bossus.com/gear/productdetails.php?ProductId=772

Ok, solved this problem by visiting roland U.S. site as the help offered in this country is useless. The instructions given by email would not have worked even after the update was installed. Luckily, there are instructions that come with the download. If you have same problem as me go to http://www.rolandus.com/products/productdetails.php?ProductId=772&tab=downloads&skip=true

and update the opperating system on the RC-50 to RC-50 System Update Version 1.01.

Then hold loop sync and phrase 2 button (think it was phrase 2) to change it to sound priority mode. Then it will play back correctly what you recorded on the first loop, rather than missing the first beat.

Am v.happy I have found this, as after much searching I can't find any other loopers out there that offer 3 seperate loop tracks and the ability to switch between them effectively. Plus, it's a very convenient size, better than a load of rackmounted stuff to haul around.

However.....

Another problem..

When hitting the reverse switch ( I assigned both external footswitch and the onboard Tempo pedal to reverse) the change is not instanteaneous. There is a second or so delay before it plays in reverse. Not a problem for most, I suppose, but I have a piece that switches rythmicaly between playing forward and reverse which means hitting a pedal in time and reverse/forwards changing immediately. I think they could do with another software update to solve this. Now I have to keep room in my enormous pedal board for the old rc-20, as that does the reverse as it should - when you hit the flippin switch!