Our Wi-Fi module product line you can find here:
Following the Wi-Fi / Wi-Fi combo modules:
The PAN9420 is a Wi-Fi 2.4G 802.11 b/g/n full embedded module with UART interface.
The PAN9020 is a Wi-Fi 2.4G 802.11 b/g/n Radio module with USB / SDIO Interface.
The PAN9026 is a Wi-Fi/BT 2.4/5G 802.11 a/b/g/n + BT5.0 Radio module with SDIO Interface.
All of them supporting SISO technology with an on-module chip antenna.
If talking about 2 channel simultaneously, I guess you mean Multi-User MIMO (MU-MIMO) technology, which comes with the new Wi-Fi technology of 802.11 ac (WAVE2). In this case independent Wi-Fi devices (Clients at least with MU-MIMO RX) can communicate with an MU-MIMO Access Point equipped with minimum 2 or up to 8 antennas simultaneously to generate very high data throughput (VHT).
Currently we don't have a Wi-Fi module which supports MU-MIMO.
Low latency in terms of IP technology means, the delay between the time a packet is sent out from a Client until the same packet is received by a Server at the far end. Most often, the round-trip time is measured from Client to Server and back (e.g. by ping).
The Wi-Fi connection itself (Wi-Fi Station and AP) plays only a partly role in terms of packet time delay. The impacts on Wi-Fi packet delay can be the used frequency band (2.4 or 5G), the utilized capacity of wireless medium, the usage of Quality of Service (QoS / 802.11e) for multimedia devices or the AP negotiated data rate (based on used 802.11 standard), where the distance between Wi-Fi Client and AP plays a role as well.
At the end both Wi-Fi Station and AP must support the Wi-Fi standards which could lead to a lower latency.
Our Wi-Fi modules are supporting 802.11n standard including HT40 with data rates up to 150 Mbps (SISO) and 802.11e (QoS). Additionally the PAN9026 supports the 5G band with the 802.11 a/n standards and HT40 for data rates up to 150 Mbps.
An Audio bi-directional link can be done with Bluetooth Classic. The BT profiles like A2DP Sink/Source (Audio Stereo) or HSP/HFP (Headset) are able to generate bi-directional communication. Usually at car entertainment units such technology is used, but mostly the antennas for BT and Wi-Fi communication are separated.
The technology of Audio over Wi-Fi is moreless an Software application, which converts Audio streaming data to IP packets, which will be transmitted over the Wi-Fi Network. To get seamless Audio Streaming in both directions of course low latency of the IP packets are essential. In this case 802.11 standards with high data rates for high packet throughput are preferred. But for Audio Streaming over Wi-Fi I assume it is not really needed to have MU-MIMO coming with 802.11 ac or at least SU-MIMO released with 802.11n standard. Such technologies are developed for high (HT) and very high (VHT) throughput to transport Video Streaming data especially for HD, UHD or 4k video resolution.