akai S-20, aliasing?

Discussions about anything related to samplers and sampling techniques.
Post Reply
User avatar
Sir Ruff
Synth Explorer
Synth Explorer
Posts: 3519
Joined: Tue May 09, 2006 11:55 pm
Gear: Two persimmon modulators and a frequency adjudicator.
Band: Ruff in the jungle
Location: Philadelphia

akai S-20, aliasing?

Post by Sir Ruff » Mon Jul 15, 2013 7:23 pm

I've been reading about the S-20, and am intrigued to see that it does not contain an anti-aliasing filter... Can anyone confirm the degree of aliasing grit that is possible with this thing? I see it has some pretty low sample rates, but am not sure how 16-bit aliasing would compare to say, 8 or 12-bit samplers.
Last edited by Sir Ruff on Sat Feb 04, 2017 4:34 pm, edited 1 time in total.
Do you even post on vse bro?

User avatar
madtheory
Supporting Member!
Supporting Member!
Posts: 5399
Joined: Mon May 01, 2006 12:45 pm
Real name: Tomas Mulcahy
Gear: Wurlitzer Opus 1536, Model F, Morovdis Arpeggiator, Maplin My First EQ, Jeff Wayne Thunderchild rack, Thermostat, Buck Owens' Moog.
Location: Cork, Ireland
Contact:

Re: akai S-20, aliasing?

Post by madtheory » Tue Jul 16, 2013 7:12 am

Where did you read that? It's not correct AFAIK. The S-20 is basically the same engine as the S2000. These alias a bit, but not very much.

Aliasing is to do with the sampling rate, not the bit depth. With samplers it's a little more complicated because there is transposing. How the transposing is done that has the biggest effect on the "sound" of the sampler. Among other things, that requires anti aliasing as well. The simplest method is to have an LPF track the keyboard e.g. Fairlight CMI. EMU led the way with DSP based trickery. It's

What do you mean by "saw"?

User avatar
Sir Ruff
Synth Explorer
Synth Explorer
Posts: 3519
Joined: Tue May 09, 2006 11:55 pm
Gear: Two persimmon modulators and a frequency adjudicator.
Band: Ruff in the jungle
Location: Philadelphia

Re: akai S-20, aliasing?

Post by Sir Ruff » Tue Jul 16, 2013 9:04 pm

"saw" = I read it on teh internets :lol:

No, I've come across a couple different forums where users state that the S-20 is basically an S-01 without the anti-aliasing filter. It seems like such an esoteric bit of knowledge, I don't doubt that it's probably true.
Do you even post on vse bro?

User avatar
Headphones.40
Newbie
Newbie
Posts: 17
Joined: Thu Sep 26, 2013 12:18 pm
Real name: Aaron
Gear: Korg EMX
Korg ER-1 mk2
Korg Kp1mini
Roland SP-505
Roland MC-09
Yamaha DX200
Mackie CFX20
Electrix Mofx

Re: akai S-20, aliasing?

Post by Headphones.40 » Thu Sep 26, 2013 12:35 pm

I'd like to find the pdf manual, but all that ever comes up is the S01 manual, but not the S20. There was one site that has it, but I refuse to pay their $9 fee to print it up....

treezyz
Newbie
Newbie
Posts: 14
Joined: Thu Nov 14, 2013 1:00 am

Re: akai S-20, aliasing?

Post by treezyz » Thu Nov 14, 2013 1:47 am

the zoom sampletrak has some real nice aliasing when sampling in 16hz and tuning down (for example sampling a record at 45+10% and tuning back to normal.) cheap too, 16 bit but low-fi sound.

can't speak on the s20, the sampletrak is all i need for that type of unit so never tried any of the yamaha SU series, sp-202, akai s20 etc.

User avatar
editdelete
Newbie
Newbie
Posts: 1
Joined: Thu Sep 18, 2014 12:57 am
Gear: Akai S20, Akai XR10, Casio SK100, Korg Monotribe, Roland MS1, Roland SP808, Yamaha DX100, Yamaha SU10, Yamaha SU700
Band: Pink Zebra

Re: akai S-20, aliasing?

Post by editdelete » Thu Sep 18, 2014 2:48 am

madtheory wrote:Where did you read that? It's not correct AFAIK. The S-20 is basically the same engine as the S2000. These alias a bit, but not very much.
I believe the S20 is a tabletop S01, not 2000. The S20 was my 1st sampler (if u dont count casio sk1). I bought another w maxxed out RAM a few years ago, but lent it out and I'm eagerly awaiting its return this weekend. It does get very crunchy, and aside from the Reverse function, since it has no filters, pitch and resampling at a lower rate is one of the few ways to edit a pad's sound.
The moon, beautiful. The sun, even more beautiful. Oh yeah. Good time. Bow bow. Chick. Chicka chickaaaaah.

User avatar
gmeredith
Moderator
Moderator
Posts: 715
Joined: Mon Oct 17, 2005 5:06 am
Band: Warning Will Robinson
Location: Tasmania, Australia
Contact:

Re: akai S-20, aliasing?

Post by gmeredith » Fri Sep 26, 2014 12:52 am

since it has no filters, pitch and resampling at a lower rate is one of the few ways to edit a pad's sound
Maybe that's what the internet references were referring to, and confused them with anti-aliasing filters??
Casio: FZ1, CZ101, PG380, VZ10M, SK8, SK60, RAP10, DP1 drums, DH100, CDP200, DM100
Yamaha: TX81z, TX802, SHS10, DTXv2
Roland: SH101, DR660, MS1, PM16, TR33
Others: Korg MicroKontrol, ES-1, Alesis MMT8, Emu ESi2000 & card reader, BCR2000, V-Machine

Post Reply