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| [#261] Logitech Squeezebox Replacement http://a.m.taobao.com/i22173848049.htm?ttid=212200@taobao_android_3.6.1 Another one with USB EHCI controller, 1G single core CPU, 1G ram,100m Lan and 4G Nand flash memory, called Cubieboard. RMB 308 only. |
benngcp 正式會員202.xxx.xxx.54 |
2013-05-02 22:00 | |
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| [#262] Logitech Squeezebox Replacement that;s a beef up Raspberry pi. |
syklab 正式會員 116.xxx.xxx.172 |
2013-05-02 22:46 |
| [#263] Logitech Squeezebox Replacement It is a different animal and they just try to ride on Rasp PI's brand in marketing. I installed the MPD to stream flac up to 24/192 and DSD files to my Chord DAC, no problem at all. It just needs around 20s to boot up. Simple and fast.  最後修改時間: 2013-05-02 22:58:30 |
benngcp 正式會員 210.xxx.xxx.196 |
2013-05-02 22:57 |
| [#264] Logitech Squeezebox Replacement It seems Cubieboard is an alternative choice for pogoplug which had been sold out. benngcp hing, which Linux you have installed? 最後修改時間: 2013-05-02 23:13:00 |
lw 正式會員 219.xxx.xxx.2 |
2013-05-02 23:09 |
| [#265] Logitech Squeezebox Replacement Debian with Kernel 3.4. |
benngcp 正式會員 210.xxx.xxx.196 |
2013-05-02 23:12 |
| [#266] Logitech Squeezebox Replacement Very interested, I think I will get one to see how it compare to pogoplug. |
lw 正式會員 219.xxx.xxx.2 |
2013-05-02 23:14 |
| [#267] Logitech Squeezebox Replacement benngcp hing, Sounds promising. Are you booting the fedora ? Anymore detail on the installation? Looks like it also supports SATA, is that correct? I am also interested to get one and try. 最後修改時間: 2013-05-02 23:19:50 |
syklab 正式會員 116.xxx.xxx.172 |
2013-05-02 23:16 |
| [#268] Logitech Squeezebox Replacement Fedora is also ok but it runs little bit slow. I use Debian as it runs fast. I store the file in my NAS and mount as a drive. SATA should be ok but never tried. You can follow the guide at http://linux-sunxi.org/FirstSteps, not difficult to follow if u have some basic Linux knowledge. MPD can be found at musicpd.org. 最後修改時間: 2013-05-02 23:39:28 |
benngcp 正式會員 210.xxx.xxx.196 |
2013-05-02 23:24 |
| [#269] Logitech Squeezebox Replacement Benngcp 師兄 我都有RASP Pi, 可否做一個教學由INSTALL LINUX到MPD呢? 謝謝 |
schmike 正式會員 113.xxx.xxx.1 |
2013-05-03 10:27 |
| [#270] Logitech Squeezebox Replacement schmike兄, 小弟路過,搭句嘴. 其實linux on embedded system 來來去去都係咁攪: 1. 你唔想煩, install linux distribution 如 arch linux, debian 等, 之後用佢地嘅 package manager (如 apt-get) 裝番 mpd + mpc. mpd 係好出名所以大多的 package manger 都有 2. 你好有心機, 想DIY, 咁就 build from scratch, 如: http://www.linuxfromscratch.org/ "1" 的話, 都係果幾隻. "2" 的話, 十分費時. 我會用"1", 因為自問無咁多時間. 另外, 有人會自己 build kernel, build mpd. 我兩樣都做過(base on "1" 的做法上), 但我唔覺有乜大分別. 或者: A. 如果你想自己 build kernel 之前, 問下自己: =================================================== "個 kernel building menu 中的選項中, 你明幾多?" =================================================== B. 如果想自己 build mpd, 都應該問問自己: =================================================== "你有乜特別 tweak 加落去令你的 custom build mpd 比公板的好聲?" =================================================== 如果你只係為 build 而 build, 也無不可, 不過要知自己個 objective. 發完 up 瘋. 樓下請繼續. 最後修改時間: 2013-05-03 10:46:45 |
beeos 正式會員 218.xxx.xxx.131 |
2013-05-03 10:45 |
| [#271] Logitech Squeezebox Replacement schmike hing, 吃了多個月 Linux 苦頭, 終於可以用到 mpd, Linux mpd 十分好用。 認同"1"的做法, 個Linux 只是個OS, 來來去去都是用 mpd, 個mpd setting 都差不多一樣。反宜用多一点時間放在電源, 效果比用不同 Linux 更大。如想方便易用, 試下 Ubuntu, 在package manger 裝 mpd, 簡單。 最後修改時間: 2013-05-03 11:03:57 |
lw 正式會員 219.xxx.xxx.2 |
2013-05-03 11:02 |
| [#272] Logitech Squeezebox Replacement 在影響聲音上, 小弟認為: Analog signal ＞ Digital signal 而 Digital signal 上: USB ＞ LAN ＞ MPD ＞ OS USB 在於線材, 織法 LAN 在於線材, isolation MPD 在於 buffer setting, process tweaking, OS 在於 process tweaking, 如 put mpd in highest priority, then usb handler, ethernet handler; 也可 tweak 不同的 network sharing protocol (cifs, nfs), 及 read buffer (rsize). 關於 Buffer tweaking: ====================== 其實成條 digital signal path 中, 由 network 的 data pickup, 到 OS file caching, 到 mpd play buffer, 到 dac usb fifo buffer (async usb 要有 buffer 先可做 "re-clock"!), 當中咁多 buffer, 我嘅 knowledge domain 話我知, 過多咁多 buffer, buffer 在前面的影響是很小很小的. 關於 Process tweaking: ====================== process priority 的確係玩 mpd 的必要 tweaking, 但think out of the box, 你的 pogoplug 又好, cubox 又好, 其實佢粒CPU只係做緊播歌, 除非你好貪心, 揾佢做埋NAS, EMAIL server, etc... 所以, 理性D諗, process tweaking for cubox / pogoplug 等小電腦係無乜必要的. 所以結論係, 有時間便玩玩 tweaking, 但也不必太花心機, 平均花心機在整個系統上更著數. |
beeos 正式會員 218.xxx.xxx.131 |
2013-05-03 11:24 |
| [#273] Logitech Squeezebox Replacement A couple days ago, I found that the Pogoplug (or SBT) will sound differently with a different server setup! I'm using VAMP 0.4 and LMS 7.8 beta on my iMac. My iMac is connected to the LAN via 5GHz wifi. It acts as the music server. Just for fun, I setup a Pogoplug with LMS 7.7.2 and connect it via a LAN cable to my Apple Extreme router. The sound is better with this Pogoplug server than my iMac! There is more micro dynamics, better micro contrast, richer harmonics and longer decays. Most noticeable with pianos, violins and guitars. It was totally unexpected. I can't quite comprehend how this can happen. My Pogoplug client (or SBT) is connected via wifi. I think probably there is less Tx errors with a LAN cable compared to wifi. The buffer inside the AE can probably stream data packets at a more steady pace. Other than that, I can't think of any reason why the sound is better with a different server setup. So I wouldn't say the buffer in front has little effect. The effect is not subtle. 最後修改時間: 2013-05-03 13:57:26 |
Kuro 正式會員 116.xxx.xxx.121 |
2013-05-03 13:54 |
| [#274] Logitech Squeezebox Replacement Kuro 兄, 對不起, 我不明白這跟wi-fi 定 wired LAN 有何關係, 可否俾多小小information? |
beeos 正式會員 218.xxx.xxx.131 |
2013-05-03 14:23 |
| [#275] Logitech Squeezebox Replacement In my setup, wifi and LAN connections sound differently. Whether it is on the client side or on the server side. The latter is a real surprise to me, as there are buffers involved in many places, I thought only the buffers on the client side are important, but apparently, it is not the case. For now, it seems the client sounds better if it is on wifi, and the server sounds better if it is on wired LAN. |
Kuro 正式會員 220.xxx.xxx.56 |
2013-05-03 14:57 |
| [#276] Logitech Squeezebox Replacement Kuro 兄, 看了你的回應, 想了良久, 還是弄不清楚你的結論是如何得出來. 或者我試下re-cap你的意思: 大前題: ======= wireless LAN 同 wired LAN 對 SB server 和 client 出來的音色的有影響的 立論: ======= 想找出 wireless LAN 同 wired LAN 對 SB server 和 client, 那個配置較好? 求證方法: ======= 沒有多提及, 估計是透過不同的 combination: Server + Wifi Client + Wifi Server + Wifi Client + wired Server + wired Client + Wifi Server + wired Client + wired ＞＞＞ 但你提到用 Squeezebox Touch (作為 SB Client), Pogoplug(裝左SB Server) 和 iMac(裝左SB Server)... 咁就唔係4組了, 可能係8組測試, 對吧? 結果: ======= "Server + wired Client + Wifi" 的組合是最好聲的. 結論: ======= "Buffer 的確對音色有些影響" ＜＜＜ 小弟好唔明這跟以上的實驗有何關係?? 莫非兄認為 wifi 的 buffer 跟 wired 的 buffer 比較, wifi 一定差D, 所以由此引申, 因為不同的傳訊方式而產生的不同 buffering 表現以至影響音色?? 師兄, 需知道, 你在比較的 wireless versus wired 當中有超過一個變數, 并不是只有 buffering 的, 而且, 如果是有 buffering 的因素, 那只是一個 by-product, 不是你這個實驗的測試手段. 你這實驗的測試手段是有線(wired LAN)和無線(wireless LAN). 請攪清楚實驗的前設, 實驗的設計, 目的, 結果和結論. 這類型的比較希望可以有更有系統的設計, 才會有更具參考性的結論. 如果只是"我說了就算", 那請不要加入好像是很科學化的內容. 話說多了, 失言之處望見諒. |
beeos 正式會員 218.xxx.xxx.131 |
2013-05-03 16:43 |
| [#277] Logitech Squeezebox Replacement Beeos hing, I have been using the Squeezebox products for many years and I never thought the server would affect the sound simply because there is a buffer in the client. I do have 3 clients: Transporter, SB Touch and a Pogoplug using VAMP. Only SBT and Pogoplug were tested with a different server setup. It wasn't meant to be a scientific experiment. It is just some empirical evidence that shows even data streaming in the upstream equipment can cause a sonic difference. Because you said "buffer 在前面的影響是很小很小的". And my experiment shows otherwise. The discovery was made when my friend wanted to setup his Pogoplug VAMP and I told him that he could use another Pogoplug as LMS. So he decided to do that so that he doesn't have to have his PC on while music is being played. It was when I switched from my iMac server to the Pogoplug server, I discovered that they do not sound the same even if I held the client side constant. In my setup, SBT and Pogoplug also do not sound the same. No one I know can explain this scientifically with hard data to show why a different client can sound differently. In my experiment, I did keep the PSU constant by using the same Level V SMPS on my SBT and Pogoplug (I've modded my Pogoplug to accept an external PSU). Of course I changed 2 variables at once on the server side in my experiment: iMac to Pogoplug and wifi to wired LAN. Moving my iMac to the living room was too much of a hassle, this was why I did not test my iMac with wired LAN. The router has a buffer. With wifi, it has a higher probability to encounter Tx/Rx errors (ie: signal interference) and hence there would be more reties. But for wired LAN, reties would be rare. If the router has to manage retries, the buffer inside the router would not be filled or re-transmitted in a steady manner. The reason why I said that is because I also tried two different wifi dongles on the Pogoplug client. I found that the one has higher Tx reties was not as good sounding as the other one with Tx retries. It was just an observation. Obviously, there are more variables involved when changing from wired to wireless LAN. But you need to realize that there are many variables we cannot change. We can only change from wired to wireless as one variable. Or LAN cable A to LAN cable B as another variable. But we cannot tune the buffer inside LMS or the router. When it comes to audio, it is 80% measurements and 20% art. Just as no one can explain why a USB cable can cause an USB Async DAC to sound differently, when the clock is located inside the DAC, not the PC. We can only tried a few different USB cables and pick the one that matches our equipment best. What I want to try later is to use Pogoplug as a server and test it with wired or wireless. Let see if there is a difference and which one sounds better. 最後修改時間: 2013-05-03 17:55:36 |
Kuro 正式會員 116.xxx.xxx.121 |
2013-05-03 17:53 |
| [#278] Logitech Squeezebox Replacement Strange.... My Naim NDX sounds worse when I use Wifi instead of Lan. I don't have USB Wifi for my cubieboard and cannot test. According to my experience, a business grade switch sounds much better than router. Belden Cat5e cable sounds much better than Cat6 cable. It is for reference only and just base on my personal taste. I compile the Linux rom on my Ubuntu PC with most of common libraries installed. In fact, you only need three command to install the MPD as below: ./configure make make install You can try different version of MPD if u install it on your own. You can always use the latest version once it is available or you can try some modified version of MPD, like the one made by the Japanese audiophile guy who makes the Cubox Linux image. To compile Kernel, you also need three coomand only as below: make ARCH=arm menuconfig make make install Then create boot image using the following commands, also 3 commands only: make ARCH=arm uImage mount /dev/mmcblk0p1 /boot cp uImage /boot I agree with Beeos that u don't need make it on your own if you can easily download the image, like the image for Cubox. Unfortunately, I cannot find any audiophile image for my Cubieboard and need to make it on my own. 最後修改時間: 2013-05-03 20:26:38 |
benngcp 正式會員 210.xxx.xxx.196 |
2013-05-03 20:22 |
| [#279] Logitech Squeezebox Replacement hi every hi-hand ching, really thank so much for all your whole-heartedly generous sharing I have struggled with MPD for few week but still can't make it work. So I swap to VAMP last night. I just follow lw ching instructions on #142 and it work, so excited! However, I encounter another problem. For wav and flac, all resolution can be played flawlessly. But for aiff file, no matter it is 44.1, 96 or 192k, all will output as 48k. I can't figure out what the problem is! Does any ching experience the same problem? And, as I'm still really interested in MPD, can any ching tell us if with same setup, let said pogoplug with same power supply, MPD or VAMP which one sound better? |
jonahung 正式會員 218.xxx.xxx.241 |
2013-05-05 15:44 |
| [#280] Logitech Squeezebox Replacement If you believe Simple is the best, you should go for MPD. MPD doesn't need any server and only for playing music. I only install the audio driver and few key components, no display, no input, etc The CPU will only focus on 1 thing, which is streaming the audio data to the DAC. By the way, I patched the Realtime Kernel for my 3.4.29 kernel and re-compile all the things this afternoon. I have tested few songs and the sonic difference is not significant but it did improve the background noise and deeper stage. Not bad. 最後修改時間: 2013-05-05 23:22:41 |
benngcp 正式會員 210.xxx.xxx.196 |
2013-05-05 23:21 |
