2012 | Angel's Place

Everyone knows what Karaoke is. For these who don’t this is the definition from Wikipedia:

Karaoke is a form of interactive entertainment or video game in which amateur singers sing along with recorded music (a music video) using a microphone and public address system. The music is typically a well-known pop song minus the lead vocal. Lyrics are usually displayed on a video screen, along with a moving symbol, changing color, or music video images, to guide the singer.

There are different types of karaoke systems – some are stand-alone hardware devices like this one for example:

karaoke machine

You can see it has a microphone attached to it, built-in speaker, small display that shows you the lyrics of the song and of course a CD tray where you place the music disk.

Well, it works but has several drawbacks:

the speaker is not powerful enough for a bigger room
the display is small and hard to read unless you are close enough
you need special disks called VCD which is hard to find especially if you are looking for the latest hit of your favourite singer

There are other systems that you connect to your DVD (to play the VCD) and to your TV to show the lyrics.

Another option is to connect your computer to the TV and install something like Karafun player. The program is free but you need again karaoke CD or you can subscribe (not free) to their library or 12 000 songs.

I was willing to give it a try but had difficulty making the microphone work properly and get the signal from it mixed with the song. I was using a regular laptop. The microphone was connected using a stereo jack and I run a cable from the headphones output to my AV receiver and the video output of the laptop was connected directly to the TV. It was not working.

I kept reading and found out I needed a hardware mixer to get the signal from the microphone and the soundtrack mixed before sending this to the amplifier (AV receiver). I kept looking and found this device:

MINI MIX800

It allows you to connect two microphones and mix them with external audio (connected at the back of the device). In addition it has Voice Canceller – effectively eliminates vocals from any stereo source while retaining most music elements. Also has Integrated digital echo/reverb processor for ultimate vocal enhancement.

My set-up now includes this device with two microphones connected to it. The headphone output from my laptop is connected to the stereo line input at the back of the device. The output is connected to my AV receiver which has 5.1 speakers attached. The video from the laptop is connected to the TV.

Now I can play a video on YouTube and sing. Usually I have the speaker volume of the computer at 50% and the microphone volume at %75. The voice canceller will not eliminate the vocals completely but will suppress it enough to give me an advantage and in the same time allowing me to hear the original vocal to help me stay in sync.

You probably are wondering “What about the lyrics?”. There is an easy solution for this too – all you need is to use Google Chrome to access YouTube and to install Zazoo extension:

Now compare this on a 40-inch LCD TV to the small display with only subtitles. I like this look better 🙂

I always was curious about ZFS but haven’t played with it until very recently. I thought it was too complicated and I was afraid it will use up too much space because of the snapshots capability.

Few days ago I installed the latest beta of FreeNAS 8 on a USB stick (here how it is done) and decided to give a try to ZFS finally.

I use an old laptop and 120GB USB hard-drive. The goal is to create the file system (ZFS) and some Windows (CIFS) shares on top of it that will be available for data storage on my local network.

I will start with creating a group (HomeUsers) and user (john). These will be used later when setting the shares owner. The next two screen-shots show just that:

The newly created group is associated with the user (through the Members button).:

The next step is to create the file system on the USB hard-disk. From the left navigation expand Storage -> Volumes and click on Volume Manager. This will show a pop-up where you type the volume name, select the disk (in this case ada0), the file system type (ZFS) and click Add Volume button:

This will also automatically create a ZFS Scrub for the volume. ZFS has a repair tool called “scrub” which examines and repairs Silent Corruption and other problems. The default interval between consecutive runs is 35 days.

With the new ZFS volume in place you can create either ZFS Volume or ZFS Dataset.

A zvol (ZFS volume) is a feature of ZFS that creates a device block over ZFS. This allows you to use a zvol as an iSCSI device extent for example.

In contrast ZFS datasets allow for more granularity when configuring which users have access to which data. A dataset is similar to a folder in that you can set permissions; it is also similar to a filesystem in that you can set quotas and compression.

NOTE: if your goal is to share an entire ZFS volume, you don’t have to create datasets. If you wish to divide up a ZFS volume’s data into different shares, create a dataset for each share.

The next screen-shot shows creation of a dataset named Backup:

Let’s set the permissions for the new dataset from Storage -> View Volumes -> Change Permissions:

The next thing will be to set up a periodic snapshot for the ZFS volume. The lifetime will be 2 weeks, it will run between 9:00 and 18:00 every hour from Monday to Friday:

Having a periodic snapshots is like having a time machine – you can go back and restore the data to a previous state. This is illustrated in the next article

In the previous article we talked about Setting up ZFS.

Here we are going to create a Windows (CIFS) share that will be accessible on the local network and will demostrate how to use the ZFS snapshots to restore lost data.

Let’s Add Windows (CIFS) Share from Sharing -> Windows (CIFS) Shares:

Creating a CIFS share will automatically start the service if it is not running already. Alternatively you can manually start or stop the service from Services -> Control Services.

We also have to configure the CIFS service (Services -> CIFS) by providing the NetBIOS name, Workgroup, etc:

Now we can try to access the newly created share by typing \\freenas2\Backup in Windows Explorer:

We have to provide username and password in order access the share. The username is freenas2\john and the password is the one you set up when creating the user:

If you look at the security settings for the share you can see something similar like this:

Now let’s create a simple text file in the share, type some text and save it:

We are going to manually create a snapshot because we do not want to wait an hour for the periodic one to just demonstrate how it works:

We are going to add some more text to the file we created earlier:

Now let’s roll back the snapshot we created – this should bring back the first version of the text file:

Indeed we got the first version of the text file:

This is really a simplistic look at the ZFS snapshots but it at least gives you some idea about how things work. I would personally experiment with bigger files (movies, pictures, etc.) to see how fast snapshots will eat up the disk space.

This article is about configuring FreeNAS (v. 8.2 BETA 3).

If you haven’t yet installed FreeNAS have a look at Installing FreeNAS to USB stick first.

We will assume that FreeNAS was installed and running on a remote computer with IP address of 192.168.1.210. Your installation most probably will have a different address. It also happens I have another installation of FreeNAS 7 and the computer is named freenas. Therefore the FreeNAS 8.2 computer is named freenas2.

If I type the IP address mentioned above in a web browser I will see the web interface home screen for FreeNAS as shown below:

You will notice the blinking button that says “Alert” on the right side of the screen. It prompts you to change the admin password (by default there is no password and anyone can access the FreeNAS GUI). Click it and it will take you to the form when you can change the password. You also can reach the form by using the tree-like navigation on the left part of the screen – expand Account -> Admin Account -> Change Password

Next time you will be asked for username (which is admin by default) and password (the one you set up above).

If you check the Change root password as well it will set the root password with the password you typed above.

Next expand Network -> Global Configuration. Here fill in the Hostname, Domain, Default gateway, Nameserver 1 and press the Save button:

You can find most of this information if you open a command prompt (DOS prompt) and type ipconfig /all:

FreeNAS can send you status reports about the system. In order this to work you need to configure the Email settings. From the navigation on the left expand System -> Settings and click the Email tab. The configuration shown below will work if you have a GMail acount. You should be able to figure out what to put in the boxes if you want to use a non-GMail account. Save the settings and click Send Test Mail to confirm it works:

These are some of the settings that I would typically adjust on a newly installed FreeNAS. There are additional setting and I encourage you to explore them. If you need more information you can always click the Help button on the tool bar.

Please make sure to check the next post

This is the current article that describes the simplest way of installing FreeNAS on USB stick in Windows without burning installation CD first.

There is an old post about installing FreeNAS on USB stick which is available here but it is more complicated and I encourage you to use this one instead.

Here is how it works:

1) Download 7-zip and install it. If you have another program installed that can work with compressed files you may want to use it instead of 7-zip.

2) Download Image Writer for Windows. Make sure to get the file that ends in binary.zip. I copied the file to C:\Temp and extracted the files into C:\Temp\win32diskimager-binary.

3) Download the FreeNAS from SourceForge The latest stable version at the moment of writing is 8.0.4. I however decided to go with the 8.2 BETA 3 which is the latest available at the moment. You need the file ending in .img.xz

FreeNAS files

I downloaded the file and placed it in C:\Temp

4) Open the file you downloaded in the previous step with 7-zip and extract its content:

It produced a file named FreeNAS-8.2.0-BETA3-x64.img

5) Write the .img file to your USB stick using the Image Writer:

Note: You need 2GB USB stick or bigger.

That’s all. Reboot your computer and make sure the boot from USB is the first choice in the BIOS.

Here is the FreeNAS Documentation Project page that gives you additional information about how to install FreeNAS on USB stick in Linux or OS X:

Burning an IMG File

CodeProject

A QR code (short for Quick Response) is a two-dimensional code originally designed in Japan and initially used in the auto industry. You can use them to encode and store textual information, link to a web site, a vCard, etc. For more information refer to Wikipedia

In order to be able to read QR codes with your smart phone you need to install a QR code reader. Here are some suggestions:

iPhone – Bakodo – Barcode Scanner and QR Bar Code Reader

Android – i-nigma Barcode Scanner

Windows Phone 7 – NeoReader

BlackBerry – ScanLife Barcode

There are many QR readers out there – it is up to you to choose the one you like the best.

So what about generating your own QR codes? You can do this as well. Go to http://goqr.me and start creating your own QR codes for free.

Here is some video on you tube about how to use QR code with vCard:

Angel's Place

A little from everything

Yearly Archives: 2012

The best Karaoke system ever

FreeNAS – Setting up ZFS

FreeNAS 8 Series

FreeNAS – Windows (CIFS) Shares on ZFS

FreeNAS – Initial configuration

Installing FreeNAS to USB stick (new and simpler way)

QR codes