This building block generates a RAW sinewave and will be the basis of a sinewave sweep generator.
This is also proof of concept and is issued as Public Domain. The final draft will have pseudo-variable bit rates for varying frequency ranges. This is the default mode, 8 bit depth, mono, 8000Hz sampling rate.
Enjoy finding simple solutions to often very difficult questions...
Bazza.
Results of this demo, note the "clear" command has been edited out:-
Good evening, I'm currently working on a BASH script to convert audio between file formats and I've come across a snag. At the beginning of the script, I'm having the system check to see if any files with the .m4a extension exist in the directory, and if so, it runs the script. If there are no... (1 Reply)
IKHz_SW_OSX.py
A DEMO mono _pure_ sinewave generator using standard text mode Python 2.6.7 to at least 2.7.3.
This code is EASILY modifyable to Python version 3.x.x...
This DEMO kids level 1KHz generator is mainly for a MacBook Pro, (13 inch in my case), OSX 10.7.5 and above. See below...... (0 Replies)
A very simple crude sinewave generator.
The file required is generated inside the code, is linear interpolated and requires /dev/audio to work. Ensure you have this device, if not the download oss-compat from your OS's repository...
It lasts for about 8 seconds before exiting and saves a... (5 Replies)
I put this together to search for unused IP addresses on a router. It's run as a Bash Command on OSX 10.9. Basically the user inputs the router address' IP range to sweep. 'jot' spits out a list of IP addresses based on that input and each one of those gets pinged. The output looks like this (tab... (4 Replies)
I'm trying to record audio using Audacity 2.0.5 installed from SlackBuilds. My system is 64-bit Slackware 14.1 and a sound card is Intel HD Audio. I didn't change my sound system to OSS. (Default sound system in Slackware 14.1 is ALSA, isn't it?) First, I set Internal Microphone slider in KMix... (2 Replies)
Ok guys, gals and geeks...
As from today I am starting to learn awk in earnest doing something totally different.
I am going to create a pseudo-Audio_Function Generator centred around OSX 10.11.x minimum. The code below is a tester to see what the possibilities are.
All waveforms will be... (11 Replies)
Hi all...
I intend to do an Audio Function Generator using Awk, (already started thanks to Don), but the biggest thing I have struggled with was variable frequency.
I was going to generate differing sized waveforms on the fly but that would that would mean the frequencies are dependent on any... (2 Replies)
Hi all...
Well I have not been inactive but working out how to make OSX 10.14.x command line audio player have a variable sample rate.
This is a back door as afplay does not have a sample rate flag unlike aplay for ALSA, in Linux flavours.
This is a DEMO only but a derivative of it will... (2 Replies)
Discussion started by: wisecracker
2 Replies
LEARN ABOUT OPENSOLARIS
audiohd
audiohd(7D) Devices audiohd(7D)NAME
audiohd - HD audio controller generic codec audio core support..
DESCRIPTION
The audiohd driver provides support for the generic codec chips which are compatible with the Intel High-Definition Audio Controller 1.0
specification.
API
This interface is described in the mixer(7I) and audio(7I) manual pages.
Driver Versions
Applications that open /dev/audio may use the AUDIO_GETDEV ioctl(2) to determine which audio device is being used. The audiohd driver
returns the string SUNW,audiohd in the name field of the audio_device structure. The version field contains a letter "a" and the config
field contains the string onboard1.
Platform Ver. Out H. Phone Spkr. In Mic. CD
x86/64 w/MCP HD audio a Y Y Y Y Y Y
Key to the above table: Ver. = Version. Out = Line Out. H. Phone = Head Phone. Spkr = Internal Speaker. In = Line In. Mic. = Microphone. CD
= CD=ROM.
The audiohd device provides support for the internal speaker, headphone, line out, line in, microphone and replicated front panel audio
parts. The play.mod_ports and record.mod_ports fields of the audio_info structure (see audio(7I)) indicate which ports may be manipulated.
Audio Mixer Mode
This driver supports the mixer mode only. (Compat mode is not supported).
Audio Data Formats
The audiohd device supports 16-bit linear encodings in stereo. With the mixer enabled, a continuous range of sample rates from 5510 to
48000 Hz is supported. With the mixer disabled, only sample rate 48000 Hz is supported.
Sample Granularity
Because the audiohd device follows the Intel HD Audio specification, buffers of audio data are supplied by streams and the reported input
and output sample counts vary at any given time from the actual sample count by no more than the size of the buffers the audiohd driver is
transferring. As a rule, programs should not rely on the absolute accuracy of the play.samples and record.samples fields of the audio_info
structure.
Interrupt Rate
The driver determines how often play and record interrupts should take place. For playing audio, this determines how often and how much
audio is requested from the audio mixer. The impact of interrupts on recording is minimal. However, if a very small read buffer size is
set, the record interrupt rate should be increased to prevent the buffer from overflowing. You can use the /kernel/drv/audiohd.conf file to
tune the play and record interrupt rates.
Audio Status Change Notification
As described in the audio(7I) and mixer(7I) man pages, it is possible to request asynchronous notification of changes in the state of an
audio device.
ERRORS
audiohd errors are described in the audio(7I) man page.
FILES
/dev/audio Symbolic link to the system's primary audio device. (Not necessarily an audiohd audio device).
/dev/audioctl Control device for the primary audio device.
/dev/sound/0 Represents the first audio device on the system. (Not necessarily an audiohd audio device).
/dev/sound/0ctl Audio control for /dev/sound/0.
/usr/share/audio/samples Audio sample files.
/kernel/drv/audiohd.conf audiohd driver configuration file.
ATTRIBUTES
See attributes(5) for a descriptions of the following attributes:
+--------------------+--------------------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+--------------------+--------------------------------------+
|Architecture |PC-based system |
+--------------------+--------------------------------------+
|Availability |SUNWaudd, SUNWauda |
+--------------------+--------------------------------------+
|Stability level |Evolving |
+--------------------+--------------------------------------+
SEE ALSO mixerctl(1), sdtaudiocontrol(1), ioctl(2), attributes(5), audio(7I), mixer(7I), streamio(7I)
Intel High-Definition Audio Specification 1.0. - Intel Corporation
ALC880 Specification -- Realtek Inc.
http://www.sun.com/io
DIAGNOSTICS
In addition to being logged, the following messages may appear on the system console:
init_state() play interrupt rate set too low
The play interrupt rate in audiohd.conf is set too low. It has been reset to the rate specified in the message. Updateaudiohd.conf to a
higher play interrupt rate.
init_state() play interrupt rate set too high
The play interrupt rate set in audio810.conf is set too high. It has been reset to the rate specified in the message. Updateau-
diohd.conf to a lower play interrupt rate.
init_state() record interrupt rate set too low
The record interrupt rate inaudiohd.conf is set too low. It has been reset to the rate specified in the message. Update audio810.conf
to a higher record interrupt rate.
init_state() record interrupt rate set too high
The record interrupt rate in audiohd.conf is set too high. It has been reset to the rate specified in the message. Updateaudiohd.conf
to a lower record interrupt rate.
SunOS 5.11 12 Sep 2008 audiohd(7D)