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by BobCochran
Tue Jan 22, 2013 3:59 am
Forum: Other projects
Topic: Getting Started with Raspberry Pi
Replies: 12
Views: 7971

Re: Getting Started with Raspberry Pi

Sometimes I think this book should be named "Getting Started with Python using Raspberry Pi"! In looking at the order of the chapters, the book starts with 2 chapters devoted to the Pi, then the next 3 chapters are Python focused, followed by a chapter discussing the Arduino when connected to the P...
by BobCochran
Mon Jan 21, 2013 11:11 pm
Forum: Python
Topic: How To Instantiate A Class; Interpreting i2c Results
Replies: 1
Views: 2165

How To Instantiate A Class; Interpreting i2c Results

Greetings, I'm playing with the Adafruit ADS1115 Analog to Digital converter breakout board ( http://www.adafruit.com/products/1085 ). I'm also using the Adafruit-Raspberry-Pi-Python-Code collection from their github repository. In this is an element named "ads1015_example.py" which runs some examp...
by BobCochran
Thu Jan 17, 2013 3:44 am
Forum: Python
Topic: Pocketsphinx Speech Recognition
Replies: 1
Views: 865

Re: Pocketsphinx Speech Recognition

I'm dabbling with pocketsphinx_continuous. I am not using python. I created a small language model for the commands I am interested in translating to particular programmatic actions. So far, pocketsphinx_continuous doesn't recognize the words I speak. I think I have to learn a lot more about how al...
by BobCochran
Thu Jan 17, 2013 3:32 am
Forum: Troubleshooting
Topic: USB packet loss.
Replies: 253
Views: 70707

Re: USB packet loss.

My testing seems to show that with the very latest Raspbian Wheezy firmware (e.g., kernel) updates, the dwc_otg.speed=1 setting is no longer needed and may even slow down USB throughput on a Model B device. The setting seems to make pocketsphinx_continuous quit.
by BobCochran
Wed Jan 16, 2013 10:40 pm
Forum: Python
Topic: Download For Python Source Code
Replies: 3
Views: 715

Re: Download For Python Source Code

Many thanks! Yes, Raspbian Wheezy, with the latest kernel updates (dated January 15). I'm asking for the Python source code, and Rurwin points me to python.org. I guess I better head there and download it -- not to my Raspberry but to my cross-compiler system. I'm looking to cross-compile the sourc...
by BobCochran
Wed Jan 16, 2013 9:35 pm
Forum: Python
Topic: Download For Python Source Code
Replies: 3
Views: 715

Download For Python Source Code

Greetings,

Where can I find downloadable source code tarballs for the Python versions that are installed on the Raspberry?

I'm at the most up-to-date firmware (Kernel version, I guess):

#358 PREEMPT Tue Jan 15 00:45:33 GMT 2013 armv6l GNU/Linux

Thanks

Bob
by BobCochran
Wed Jan 16, 2013 3:58 am
Forum: Automation, sensing and robotics
Topic: Speech Recognition with Pocketsphinx
Replies: 46
Views: 51014

Re: Speech Recognition with Pocketsphinx

I just tried out sphinxbase and pocketsphinx 0.8. The word recognition is low. That is with a headset microphone, too! As observing says above, I may need to check my sample rate and adjust it to 48000 Hz. I created my own language model and dictionary using tools discussed here http://cmusphinx.so...
by BobCochran
Tue Jan 15, 2013 4:22 am
Forum: Graphics, sound and multimedia
Topic: Cross-Compiling ffmpeg and LAME
Replies: 0
Views: 2146

Cross-Compiling ffmpeg and LAME

Greetings! I am cross-compiling ffmpeg sources obtained from ffmpeg.org. I followed their instructions for building ffmpeg for the Raspberry -- they have a web page devoted to it. See http://ffmpeg.org/trac/ffmpeg/wiki/How%20to%20compile%20FFmpeg%20for%20Raspberry%20Pi%20%28Raspbian%29 I thought it...
by BobCochran
Tue Jan 15, 2013 3:50 am
Forum: Graphics, sound and multimedia
Topic: Crash With Plantronics USB Microphone/Headset With "DSP"
Replies: 3
Views: 2565

Re: Crash With Plantronics USB Microphone/Headset With "DSP"

I want to follow up with this. I discovered that if I reboot the Raspberry with the Plantronics headset plugged into the USB hub, it shows up as 'snd_usb_audio' and I am indeed able to record an intelligible message with `arecord'. This incantation, issued as root: arecord -D sysdefault:CARD=Headse...
by BobCochran
Sat Jan 12, 2013 1:27 am
Forum: Graphics, sound and multimedia
Topic: Crash With Plantronics USB Microphone/Headset With "DSP"
Replies: 3
Views: 2565

Re: Crash With Plantronics USB Microphone/Headset With "DSP"

I'm sorry for taking so long to get back to you. I received my Pibow case, then some other distractions came along. I am working with a "Plantronics USB DSP Audio Interface". That is what is printed on the unit housing. Here is the sequence of my work with the headset: I plugged a powered D-Link DU...
by BobCochran
Tue Jan 08, 2013 3:57 am
Forum: Graphics, sound and multimedia
Topic: Crash With Plantronics USB Microphone/Headset With "DSP"
Replies: 3
Views: 2565

Crash With Plantronics USB Microphone/Headset With "DSP"

I have an old Plantronics headset with microphone, the kind that advertises "DSP" with a fat container through which a cable runs. One end of the cable terminates in a USB "A" plug for plugging into the Raspberry, the other end runs into a small volume control that has a mute button and from there w...
by BobCochran
Sun Jan 06, 2013 9:44 pm
Forum: Other projects
Topic: Getting Started with Raspberry Pi
Replies: 12
Views: 7971

Re: Getting Started with Raspberry Pi

Chapter 6, "Arduino and the Pi", is very interesting for me since I have loads of "Really Bare Bones" boards and a JeeNode plus an RFM12B transceiver. On page 78 of the book, we learn we can install the Arduino IDE, which also causes Java to be installed. But I was under the impression from the pos...
by BobCochran
Sun Jan 06, 2013 9:31 pm
Forum: Other projects
Topic: Getting Started with Raspberry Pi
Replies: 12
Views: 7971

Re: Getting Started with Raspberry Pi

Still reading, and also using the book to set up the Pi for GPIO. In Chapter 7, "Basic Input and Output", page 91, we learn how to turn on an LED which is connected to GPIO pin 25. Some of the command line code is: echo 25 > /sys/class/gpio/export ... ... but when we get to the bottom of page 91, w...
by BobCochran
Sun Jan 06, 2013 5:52 pm
Forum: For sale
Topic: Pibow (a colourful case for your Raspberry Pi)
Replies: 122
Views: 29984

Re: Pibow (a colourful case for your Raspberry Pi)

I just ordered a classic Pibow (which I believe was made by the real Pibow company) and should get it in several days. I have a Model B Pi board and I am just wondering if there is enough room inside the case to contain the P5 headers. My understanding is those have to be installed "upside down" so ...
by BobCochran
Sun Jan 06, 2013 2:07 pm
Forum: Graphics, sound and multimedia
Topic: My internet Radio
Replies: 6
Views: 2698

Re: My internet Radio

I am very impressed too, plus I am learning from you. I have one question: what is an "LDR" on the wifi stick? I apologize if my English is hard to read. I apologize even more for not knowing any German (Detusche).

Bob
by BobCochran
Sun Jan 06, 2013 5:33 am
Forum: Graphics, sound and multimedia
Topic: No sound !!!
Replies: 17
Views: 14212

Re: No sound !!!

I bet this link will help you out.

http://elinux.org/R-Pi_Troubleshooting#Sound

Bob
by BobCochran
Sat Jan 05, 2013 4:22 am
Forum: Teaching and learning resources
Topic: CAS Educational Manual:how to contribute
Replies: 31
Views: 12020

Re: CAS Educational Manual:how to contribute

How many illustrations did Helen Ireland do? I so wish there were more from her. I find the illustration at the start of the book to be very appealing. More illustrations would really add to the book.

Bob
by BobCochran
Sat Jan 05, 2013 1:25 am
Forum: Other projects
Topic: Getting Started with Raspberry Pi
Replies: 12
Views: 7971

Re: Getting Started with Raspberry Pi

I have some impressions based on a rapid 'riffling' through the book, plus starting to read it from the very first page. In general, the book has interest for me: it keeps me reading. The illustrations (by Marc de Vinck, right?) are a bit of a surprise for me, since I was expecting to see photograph...
by BobCochran
Fri Jan 04, 2013 3:30 am
Forum: Other projects
Topic: Getting Started with Raspberry Pi
Replies: 12
Views: 7971

Re: Getting Started with Raspberry Pi

I have my copy of the book. I'm reading it now.

Bob
by BobCochran
Thu Jan 03, 2013 3:39 am
Forum: Graphics, sound and multimedia
Topic: USB soundcard...Finally good (non HDMI) Analog Audio
Replies: 147
Views: 161186

Re: USB soundcard...Finally good (non HDMI) Analog Audio

Does the PCM 2704 device featured in this thread do microphone input? If not, what is a good microphone for such a project? The mic has to capture speech from as far away as 10-15 feet. The PCM 2704 card does not have a mic input. The initial "el-cheapo" card I first used did have a mic input, but ...
by BobCochran
Wed Jan 02, 2013 7:31 am
Forum: Graphics, sound and multimedia
Topic: USB soundcard...Finally good (non HDMI) Analog Audio
Replies: 147
Views: 161186

Re: USB soundcard...Finally good (non HDMI) Analog Audio

I have a project where I need to have audio input, e.g. a microphone, and audio output as well. The idea is to do speech recognition with Carnegie-Mellon's PocketSphinx. I don't know anything about sound cards. I'm completely ignorant. Does the PCM 2704 device featured in this thread do microphone i...
by BobCochran
Wed Jan 02, 2013 1:22 am
Forum: Other projects
Topic: Getting Started with Raspberry Pi
Replies: 12
Views: 7971

Re: Getting Started with Raspberry Pi

I ordered the book and should get it in a couple days. Got to secure my place in line before Amazon runs out! I also plan to buy your BeagleBone book as well, since I'm curious about the device.

Bob
by BobCochran
Tue Jan 01, 2013 11:20 pm
Forum: Other projects
Topic: Getting Started with Raspberry Pi
Replies: 12
Views: 7971

Re: Getting Started with Raspberry Pi

Hi Matt, Congratulations on publishing the book. What a massive job that is. I will order it later tonight. I've already studied and printed some of your stuff on GPIO access. I believe you did YouTube video on GPIO access on the BeagleBone and I watched that one twice. Since I'm deaf, I appreciate ...
by BobCochran
Tue Jan 01, 2013 8:58 pm
Forum: Beginners
Topic: SHA-1 Checksum
Replies: 6
Views: 957

Re: SHA-1 Checksum

The checksum is for the file that you are downloading -- the zip file. The purpose is to make sure that the contents of the zip archive have not been modified in any way from how the distributors packaged it. If the checksum on the zip file matches what the distributors publish, you are good to go a...
by BobCochran
Tue Jan 01, 2013 7:10 am
Forum: Beginners
Topic: How to set up your Pi as your web server
Replies: 69
Views: 27570

Re: How to set up your Pi as your web server

Now I come to the final part of the guide, Section C1 "Copy your Website Files". I continue to have difficulty understanding why you would need to install an FTP server on the Raspian web server. Anyone can copy an entire website, anywhere in the world, using the web browser's capability to save com...

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