07 November 2015, 19:27 | #1 |
Registered User
Join Date: Sep 2015
Location: Germany
Posts: 260
|
WAV-16-bit-files converted to RAW-8-bit-files
I'm planning to compose some protracker-MODs with the Roland TR808 samples.
I have found the right WAV-samples in 16 bit format and converted them with wav2ami into RAW-8-Bit files to use them with the protracker. I know that the quality decreases converting 16 bit to 8 bit. But the result in most cases is horrible. Much noise superimpose the samples data and the amplitude is very low so the samples are not very loud. The highhat/handclap/ claves samples on the ST-01: are much better than the converted ones from the WAV-files. Reworking the samples (cutting the length etc.) with the protracker didn't help very much. Does anyone know a better way or a tool for converting without decreasing the quality so much? |
07 November 2015, 20:18 | #2 |
Computer Nerd
Join Date: Sep 2007
Location: Rotterdam/Netherlands
Age: 48
Posts: 3,852
|
That's part of the problem. The 16 bit samples have to be as loud as possible without clipping before you convert them to 8 bit. For use in Protracker they also have to be down sampled using a good down sampling algorithm. Also, DO NOT USE DITHERING! The sample rates will be way to low for dithering to be useful.
There may be a bit more to it than that. Some of our local audio experts will probably explain this better than I can |
09 November 2015, 22:17 | #3 | ||
Registered User
Join Date: Sep 2015
Location: Germany
Posts: 260
|
Quote:
Quote:
|
||
09 November 2015, 22:48 | #4 |
Registered User
Join Date: Nov 2013
Location: Spain
Age: 45
Posts: 314
|
You can use the script in there (check the entire post)
http://eab.abime.net/showpost.php?p=940131&postcount=3 it will apply some compression to enhance the lost of resolution. You can modify the script to match your requirements |
17 November 2015, 18:12 | #5 | |
Registered User
Join Date: Sep 2015
Location: Germany
Posts: 260
|
Quote:
|
|
22 March 2016, 04:10 | #6 |
Registered User
Join Date: Jan 2016
Location: Santa Cruz/US
Posts: 48
|
I came across this thread, and also noticed that wav2ami automatically down samples, as opposed to e.g. sox. I need to down sample, otherwise the pitch is too low for use in Protracker. Can someone explain why that is, why I need to down sample?
|
02 April 2016, 21:57 | #7 |
Lemon. / Core Design
Join Date: Mar 2016
Location: Tier 5
Posts: 1,213
|
because original samples are probably at 44.1khz... and Amiga will play at some much lower rate
|
04 April 2016, 16:12 | #8 |
Registered User
Join Date: Jun 2010
Location: PL?
Posts: 2,888
|
Side to this adrdesign script is incorrect as Amiga (Paula) have no 22050Hz sample rate.
Closest to 22050Hz is AUDxPER=161 and frequency 22030Hz (real 22030.4Hz). It is easier to perform conversion on PC, bellow verified sox syntax: (stereo is converted to mono, sample rate conversion to 22030Hz, automatic gain to maximize level without clipping) Code:
@sox --multi-threaded --buffer 65536 -S -V -D %1 -e signed-integer -b 8 -c 1 %~n1.s8 remix - rate -v -s -L 22030 gain -n -0.07 stats -b 8 stat |
04 April 2016, 17:01 | #9 |
Registered User
Join Date: Oct 2009
Location: Germany
Posts: 3,310
|
If you play a 22050Hz sample in protracker 22168Hz or 22030Hz I don`t see/hear any problem. You get problems when your sample is a drumloop (at least 4 beats). Then it can go out of sync. I also noticed that BPM might be different from device to device. For example when I record a drumloop at 125 BPM from MC-303 and play it in Protracker at 125 BPM it needs finetuning to fit the sync.
However, for single instruments and most non drumloop samples a simple 44,1kHz to 22050Hz conversion is good enough IMO. Drift errors can be fixed by finetuning. |
05 April 2016, 18:59 | #10 | |
Registered User
Join Date: Jun 2010
Location: PL?
Posts: 2,888
|
Quote:
Playing 22050Hz transposed down by almost 20Hz seem to me like not the best idea especially in case where people complain that Amiga sample rate are not in line with common musical notation, and yes - i agree probably 20Hz detune will be not particularly noticeable by most of people but if things can be done correctly then why bother especially that proper sample rate conversion take on PC anyway less time than on Amiga (from my perspective modern PC with lot of RAM, CPU power, and storage space is better tool to convert from 16 bit to 8 bit than Amiga - also amount of data required to transfer is lower). |
|
05 April 2016, 20:44 | #11 |
Registered User
Join Date: May 2001
Location: ?
Posts: 19,658
|
If 22050 isn't correct, let's not use it! 20Hz could be a problem and finetuning within Protracker isn't the best option.
Then again it isn't all that simple. Supposedly, if you are converting samples in different keys, you need to use different sample rates. The "one for all" method only works if you are going to use Protracker just for sample sequencing, meaning you aren't going to "compose" there or you convert every asset on the same key to the same sample rate. The moment you introduce a sample from another source, you're gonna hear the problems. |
06 April 2016, 11:40 | #12 | |
Registered User
Join Date: Jun 2010
Location: PL?
Posts: 2,888
|
Quote:
All above are valid and i believe this is well known limitation for wavetable samplers. |
|
11 March 2019, 09:33 | #13 | |
Registered User
Join Date: Sep 2015
Location: Germany
Posts: 260
|
Roland Juno 60 preset samples
Like I did for the Roland TR-808, I want to convert 16 bit/WAV samples of these Roland Juno 60 presets:
Quote:
The problem is, that it was impossible for me to find all Juno 60 presets as samples, only a few of them. Does anyone know where to find the complete presets samples? |
|
12 March 2019, 11:17 | #14 |
Registered User
Join Date: Jan 2019
Location: Italy
Age: 44
Posts: 76
|
hi
samplemanager convert maybe well, try it on aminet need guigfx and render library |
12 March 2019, 22:13 | #15 | |
Registered User
Join Date: Sep 2015
Location: Germany
Posts: 260
|
Quote:
What I need are the sample-files recorded from the Roland Juno 60 presets, mentioned in my last post, played once with a certain note like C-3 ! Again, does anyone of you know where to get the recorded WAV-samples of the Juno 60 presets for a special note? They don't have to be for free, I would also pay for it. |
|
17 July 2019, 15:09 | #16 |
Junior Member
|
I found a way but it depends if you would like it!
I discovered Protracker for the PC. found it actually works quite well and allows protracker modules to load, play and edit. It not brilliant but its a pretty dam good stab at it. The point here is, it can load 16bit wavs in, they work. But more importantly! you can save the sample back out as 8bit mono 22khz that is 100% what the Amiga wants The quality is very good as well. |
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests) | |
Thread Tools | |
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Dumping Mods To Wav Files | CodyJarrett | support.Apps | 13 | 23 September 2020 17:57 |
Extracting Wav Files | yugioh | Retrogaming General Discussion | 3 | 17 December 2008 09:11 |
Bad DMS files on 17-bit CD-ROMs | mark_k | request.Other | 3 | 14 September 2008 18:17 |
Commodore 64 Wav Files to be Converted back to Audio Tape File | Paradroid90 | support.Other | 10 | 17 June 2008 03:47 |
Need 2 .hip module files converted to mod or 44,100kHz, 16 bit, Stereo. | Ironclaw | Retrogaming General Discussion | 18 | 13 June 2007 23:16 |
|
|