typo bug fixing
Found 2 bugs in the blogging software typo that I am using. Both are related to the Atom feed for comments.
First, the theme incorrectly used the name instead of the id to retrieve the article. In views/articles/_article.html.erb, change :
to:
And in the app itself, the code forgot to check if there is any comment at all before trying to read from it. In app/views/articles/_atom_feed.atom.builder, change:
to:
First, the theme incorrectly used the name instead of the id to retrieve the article. In views/articles/_article.html.erb, change :
<a href="<%= url_for :controller => 'xml',
:action=>'feed', :type=>'article',
:format => 'atom', :id => @article %>">Atom feed</a>. <a href="<%= url_for :controller => 'xml',
:action=>'feed', :type=>'article',
:format => 'atom', :id => @article.id %>">Atom feed</a>. And in the app itself, the code forgot to check if there is any comment at all before trying to read from it. In app/views/articles/_atom_feed.atom.builder, change:
feed.updated atom_feed.first.updated_at unless atom_feed.first.blank?
feed.updated atom_feed.first.updated_at
end 
typo correction
Finally a holiday that no need to go to work. Time to fix those broken things.
Recently, this blog started to get attention from spam robots. Time to enable the spam filter. Luckily, the blogging software that I use supports Akismet. Also took this opportunity to upgrade Ruby, Gems, Ruby on Rails, and the blogging software typo... what a better way to spend the whole afternoon... orz...
Still have some minor issues... e.g. the Atom feed is not working etc... will fix them later.
Recently, this blog started to get attention from spam robots. Time to enable the spam filter. Luckily, the blogging software that I use supports Akismet. Also took this opportunity to upgrade Ruby, Gems, Ruby on Rails, and the blogging software typo... what a better way to spend the whole afternoon... orz...
Still have some minor issues... e.g. the Atom feed is not working etc... will fix them later.
是日金句
"If you don't want to tell me everything, that’s fine. Just don't lie to me."
Be Strong
Be Strong - Delta Goodrem
Are you swimming upstream in oceans of blue?
Do you feel like you're sinking?
Are you sick of the rain after all you've been through?
Well I know what you're thinking
When you can't take it
You can make it
Sometime soon I know you'll see
'cause when your in you're darkest hour
And all of the light just fades away
When you're like a single flower whose colours have
turned to shades of gray
Well hang on and be strong
We're taking each step one day at a time
You can't loose your spirit
Let live and let live forget and forgive
It's all how you see it
And just remember keep it together
Don't you know you're never alone
'cause when you're in your darkest hour
And all of the light just fades away
When you're like a single flower whose colours have
turned to shades of gray
Well hang on, and be strong
No you're not defeated
And soon you'll be smiling once again
Then you won't have to feel it
Let it go with the wind
Time passes us by
And know that you're allowed to cry
'cause when you're in your darkest hour
And all of the light just fades away
When you're like a single flower whose colours have
turned to shades of gray
Well hang on and be strong 何處惹塵埃
煩~
上星期尾發現咸水喉入屋附近有水滲出黎。Weekend 叫左屋主上黎睇，拍板要整。隨即 call 師傅上黎。睇完一輪，又鑽左一輪。
最後發現水喉裂o既位置太深，係牆中間，所以要搭棚出去鋸左條喉，成條換。
星期一朝早九點幾兩個搭棚師傅就到左。唔洗一個鐘頭就搭好個棚。勁！
跟手兩個水喉師傅接力。一個係出面，一個係入面。又鋸又鑽，幾個鐘頭之後攪掂。之後等多幾個鐘等o的膠水乾。之後再開番大廈水制試過ok，師傅係六點幾o既時候終於可以收工。
最後成屋都係灰塵，又要抹抹抹抹抹… orz…
上星期尾發現咸水喉入屋附近有水滲出黎。Weekend 叫左屋主上黎睇，拍板要整。隨即 call 師傅上黎。睇完一輪，又鑽左一輪。
最後發現水喉裂o既位置太深，係牆中間，所以要搭棚出去鋸左條喉，成條換。
星期一朝早九點幾兩個搭棚師傅就到左。唔洗一個鐘頭就搭好個棚。勁！
跟手兩個水喉師傅接力。一個係出面，一個係入面。又鋸又鑽，幾個鐘頭之後攪掂。之後等多幾個鐘等o的膠水乾。之後再開番大廈水制試過ok，師傅係六點幾o既時候終於可以收工。
最後成屋都係灰塵，又要抹抹抹抹抹… orz…
iPod mini mod
The microdrive in my first generation iPod mini finally died a few days ago.
The 1st gen iPod mini utilizes the same Wolfson Microelectronics WM8731L audio chipset as the 3rd gen iPod (which is believed to be the iPod with the best sound quality). The technical details can be found here.
Anyway, many people has tried to mod the 1st gen iPod mini to use flash based card. Now I have a good excuse to try it :P
First thing to do is to find the right compactflash card. The key word to look for here is "ATA compatibility". The speed of the card doesn't matter. The one that I used is from the A-Data Speedy series. Picked up the 16GB model for HKD520.
The rest is easy. Just follow the online tutorial to disassemble the iPod mini and replace the microdrive.
Finally, connect the iPod mini to a computer and use iTunes to restore the firmware. Restart. And iPod mini recognizes the card without any problem.
To do: replace the battery with a higher capacity one and reinstall the Rockbox firmware later to play FLAC.
The 1st gen iPod mini utilizes the same Wolfson Microelectronics WM8731L audio chipset as the 3rd gen iPod (which is believed to be the iPod with the best sound quality). The technical details can be found here.
Anyway, many people has tried to mod the 1st gen iPod mini to use flash based card. Now I have a good excuse to try it :P
First thing to do is to find the right compactflash card. The key word to look for here is "ATA compatibility". The speed of the card doesn't matter. The one that I used is from the A-Data Speedy series. Picked up the 16GB model for HKD520.
The rest is easy. Just follow the online tutorial to disassemble the iPod mini and replace the microdrive.
Finally, connect the iPod mini to a computer and use iTunes to restore the firmware. Restart. And iPod mini recognizes the card without any problem.
To do: replace the battery with a higher capacity one and reinstall the Rockbox firmware later to play FLAC.
PIMETA headamp
After reading my DAC post, some friends asked me what exactly is my "PIMETA headamp".
The PIMETA headamp is the box on the left.
Well, first of all, headamp is an amplifier for headphones. It takes the audio signal from the source, amplify it (can be both in terms of voltage and current), and drive the headphone.
This particular headamp that appeared with the DAC is a PIMETA that I built a few years ago. It is simple to built and tune.
Here is a peek inside.
The big blue box is an Alps volume control. The four red cylinders are Elna Cerafine capacitors. The little board on the side with yellow sockets is my DIY voltage regulator to provide clean power to the headamp.
A closer look.
I fitted this headamp with 6 x BUF634. BUF634s are buffers that provide enough current to drive the headphone. They also help to drive the headamp "deeper" into Class-A.
3 x AD843 op-amps provide the voltage amplification. Different op-amps have different sound signature. Op-amp swapping is the easiest way to tune and modify this headamp.
Close up on the op-amps. These 2 are for the left and right channels. The other OPA843 is on another socket for the ground channel.
The PIMETA headamp is the box on the left.
Well, first of all, headamp is an amplifier for headphones. It takes the audio signal from the source, amplify it (can be both in terms of voltage and current), and drive the headphone.
This particular headamp that appeared with the DAC is a PIMETA that I built a few years ago. It is simple to built and tune.
Here is a peek inside.
The big blue box is an Alps volume control. The four red cylinders are Elna Cerafine capacitors. The little board on the side with yellow sockets is my DIY voltage regulator to provide clean power to the headamp.
A closer look.
I fitted this headamp with 6 x BUF634. BUF634s are buffers that provide enough current to drive the headphone. They also help to drive the headamp "deeper" into Class-A.
3 x AD843 op-amps provide the voltage amplification. Different op-amps have different sound signature. Op-amp swapping is the easiest way to tune and modify this headamp.
Close up on the op-amps. These 2 are for the left and right channels. The other OPA843 is on another socket for the ground channel.
DAC
Finally bite the bullet and got myself a DAC. Well, an USB DAC to be exact. (Anyway, my main concern is on the DAC part. The USB sound card in it is just a bonus :P)
It is the Mini USB DAC by HiFIidiy.net. Granted, it is not the best DAC out there. But given its price (< HKD900), it is tough to beat in its own class.
This DAC is based on the Texas Instrument PCM1793. And rumor said that the headphone amplifier part is a clone of the Solo.
But to my ears, my DIY PIMETA sounds much better that the built-in headamp.
On the left is my DIY PIMETA headphone amplifier, with Analog Devices AD843 op-amps installed. (If you love pop/vocal and is not a bass-head, I strongly recommend the AD843 op-amp. It might not has the details of the OPA627 / OPA637, but the tone produced by AD843 beats them all (even the OPA2111 that I have can't beat the AD843).
My current setup is: Pioneer DV-636D -> (S/PDIF) -> DAC -> PIMETA. The S/PDIF cable is a Canare cable. There were debates on the net that whether a RCA cable can really make a real 75 ohm coxial cable. But nevertheless, this Canare cable with the designed plugs seems to be doing fine... at least to my ears (These Canare plugs require a special crimp to assemble the cable... so I bought this interconnect directly from a studio shop).
The analog RCA interconnects are DIY ones made from Swiss Gotham GAC-1 cable with Canare plugs.
It is the Mini USB DAC by HiFIidiy.net. Granted, it is not the best DAC out there. But given its price (< HKD900), it is tough to beat in its own class.
This DAC is based on the Texas Instrument PCM1793. And rumor said that the headphone amplifier part is a clone of the Solo.
But to my ears, my DIY PIMETA sounds much better that the built-in headamp.
On the left is my DIY PIMETA headphone amplifier, with Analog Devices AD843 op-amps installed. (If you love pop/vocal and is not a bass-head, I strongly recommend the AD843 op-amp. It might not has the details of the OPA627 / OPA637, but the tone produced by AD843 beats them all (even the OPA2111 that I have can't beat the AD843).
My current setup is: Pioneer DV-636D -> (S/PDIF) -> DAC -> PIMETA. The S/PDIF cable is a Canare cable. There were debates on the net that whether a RCA cable can really make a real 75 ohm coxial cable. But nevertheless, this Canare cable with the designed plugs seems to be doing fine... at least to my ears (These Canare plugs require a special crimp to assemble the cable... so I bought this interconnect directly from a studio shop).
The analog RCA interconnects are DIY ones made from Swiss Gotham GAC-1 cable with Canare plugs.
Let's Start from Here - Joanna Wang 王若琳
By：Luke McMaster / Vincent Degiorgio / Damhnait Doyle
giving up why should I have come too far to forget
beautiful just got lost somewhere along the way
so much was missing when you went away
let's start from here lose the past change our minds
we don′t need a finish line
let's take this chance don’t think too deep
all those promises we couldn't seem to keep
I don't care where we go let's start from here
standing here face to face a finger on your lips
don't say a word don't make a sound silence surrounds us now
even when you were gone I felt you everywhere
let's start from here
I've never been the one to open up
but you've always been the voice within
the only one for my cold heart
let's start from here lose the past change our minds
we don't need a finish line
let's take this chance don’t think too deep
and all those promises we couldn't seem to keep
I don't care where we go let's start from here