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Short: Oscilloscope/analyzer for Delfina DSP
Author: Smack/Infect! (Michael Henke)
Type: mus/misc
$VER: DelfScope 0.1 (Tue 03-Oct-2000)
#features
-reads audio data from Delfina input connector (external source)
or from a sound player program (AHI, DelfSF etc.)
-realtime displays:
- stereo level meter
- stereo oscilloscope
- spectrum analyzer
-can use any native Amiga screen mode (no CGFX support, sorry)
-free software (full source code included, of course)
#requirements
-CPU 68020+
-AmigaOS V37+
-Delfina DSP board
-developed on: A1200 (68030+882 @ 40MHz, 16MB Fast, Delfina1200 DSP)
#how to use it
Connect an external audio source (CD player, TV etc.) to your Delfina's
input or launch your favourite sound player program. Start DelfScope.
These options can be used:
MODEID / -m screen mode ID.
if omitted a reqtools screenmode requester appears.
specify a decimal or hexadecimal (prefix $ or 0x) value.
(example: MULTISCAN:Productivity - 233508 or 0x39024)
the visible screen size should be at least 640x480 pixels.
NOTE: only native Amiga modes (ECS/AGA) are supported!
INPUT / -i name of the DelfModule to use as source.
(default: "Connectors" - Delfina's input connector)
here you can specify the name of the DelfModule that
supplies DelfScope with input data. use the "listmod"
command while you run a particular Delfina program to
find out the name of its DelfModule. some examples are:
"14Bit-NotePlayer" (AHI for DeliTracker by Chris Hodges),
"DelFX", "DelfSF", "DelfAIFF", "DelfMPEG".
NOTE: the names are case-sensitive!
and unless you're a lucky owner of a Delfina Plus with
128K memory / 74MHz DSP you will not be able to run
DelfMPEG and DelfScope at the same time.
Use these keys on the DelfScope screen:
Esc quit
Space pause / continue
o oscilloscope mode
s spectrum analyzer mode
1...9 set redraw rate (lower=faster)
+ - increase / decrease input gain (for "Connectors" input only)
#technical stuff
-The width of the oscilloscope display depends on the vertical refresh
rate (fps). On slower screen modes (e.g. PAL - 50 Hz) the display is
wider so that all input data can be visualized.
-The spectrum analyzer employs a 1024-point FFT routine that runs on the
DSP (adapted from Motorola example sources).
-The plot routines (written in assembly language) are pretty simple and
use brute force in order to be fast. They only work with native screen
modes because they write directly into chip memory.
Anybody interested in better/more flexible plot routines? Then just
take my sources and modify them as you want.
#known problems
-DelfScope sometimes simply freezes my Amiga system, so don't work on
any precious data in the background - you have been warned!
This might be a "Delfina bug" of some kind, but currently I have no idea
how to solve this problem. :-(
#author
mailto: smack@smack.de
DelfScope - oscilloscope/analyzer for Delfina DSP
Copyright (C) 2000 Michael Henke
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
============================= Archive contents =============================
Original Packed Ratio Date Time Name
-------- ------- ----- --------- -------- -------------
18113 7000 61.3% 03-Oct-00 03:53:00 +COPYING
34132 20632 39.5% 03-Oct-00 03:53:00 +DelfScope
4145 1993 51.9% 03-Oct-00 03:53:00 +DelfScope.readme
139 115 17.2% 03-Oct-00 03:53:00 +CHANGES
21476 6565 69.4% 03-Oct-00 03:53:00 +DelfScope.c
8970 2238 75.0% 03-Oct-00 03:53:00 +scope_asm.a
1386 596 56.9% 03-Oct-00 03:53:00 +scope_asm.h
34132 11158 67.3% 03-Oct-00 03:53:00 +scope_dsp.a56
1393 658 52.7% 03-Oct-00 03:53:00 +scope_dsp.h
198 131 33.8% 03-Oct-00 03:53:00 +SCOPTIONS
290 121 58.2% 03-Oct-00 03:53:00 +smakefile
-------- ------- ----- --------- --------
124374 51207 58.8% 04-Oct-100 05:00:16 11 files